In the SCCS design, the analysis only includes individuals who we

In the SCCS design, the analysis only includes individuals who were both vaccinated and had an event of interest during the observation period. The rate of endpoints per day is compared between an ‘at risk’ period and a control period, which is far enough removed from the time of vaccination http://www.selleckchem.com/products/EX-527.html that it is unlikely for a vaccine to have caused the

endpoint [16]. For each individual, the index date for the exposure is the date of vaccination. Follow-up time for each individual is divided into three distinct intervals: an exposed period (or ‘at risk’ period), an unexposed period (or control period), and a washout period in between the exposed and unexposed periods. Our selection of the ‘at-risk’ and control periods was based on our previous study of ER visits and/or hospitalizations following 2-, 4-, 6-, and 12-month immunizations [9] and [10]. For the 2-, 4- and 6-month immunizations, the ‘at-risk’ period was 0 to 2 days following vaccination and the control period was 9 to 18 days post-vaccination. For the 12-month vaccination, the ‘at-risk’ period was 4 to 12 days post-vaccination and the control period was 20 to 28 days post-vaccination. We calculated the relative incidence of the composite endpoint (ER visits and/or hospital

admissions) in the exposed period versus the unexposed period using a fixed effects conditional Poisson regression model. The regression model controlled for exposure period and individual Ivacaftor manufacturer patients, thereby allowing each individual to serve as his/her own control. To control for the dependence of multiple events occurring close together in time (e.g. an ER visit leading to an

admission, or serial ER visits), each individual was classified as having ‘one or more events’ or ‘no events’ in each of the ‘at-risk’ and control tuclazepam periods. In order to determine whether the relative incidence of the composite endpoint varied between males and females, we included a risk by sex interaction term in the SCCS conditional Poisson model. A likelihood ratio test is used to compare the full model including the interaction term to the reduced model without the interaction term in order to test whether the interaction term is statistically significant [16]. The parameter estimate of this interaction term can be exponentiated to yield a “relative incidence ratio” (RIR) which is equivalent to the ratio of relative incidence in females to the relative incidence in males: an intuitive measure of the magnitude of the difference in relative incidences for females versus males. This RIR has the added benefit of allowing us to overcome the impact of the healthy vaccinee effect, the decision by parents and health care providers to forgo vaccination when a child is acutely ill resulting in the administration of vaccines to children who are in a comparatively healthy state [7] and [8].

The data show that adaptive immunity is not required for DI virus

The data show that adaptive immunity is not required for DI virus to protect SCID mice from acute influenza. However, in contrast to immune-competent animals, a delayed onset disease occurred about 1 week later, indicating that adaptive immunity is required to act in concert with DI virus to clear the infection. The 244 DI RNA used

here to protect mice was originally generated spontaneously during transfection of 293T cells with plasmids [32] to make infectious influenza A/PR/8/34 [18]. After 24 h, the 293T cells were trypsinized, mixed with MDCK cells and re-plated, and culture supernatants harvested 7 days later. Resulting virus was passaged twice in embryonated chicken’s eggs. The resulting mixture of 244 DI virus, packaged in a A/PR8 particle, and infectious helper A/PR8 virus was purified by differential centrifugation through sucrose. Stocks were resuspended in PBS containing 0.1% (w/v) bovine selleck chemical serum albumin, standardized by haemagglutination titration, and stored in liquid nitrogen. Before inoculation into mice, helper virus infectivity was eliminated with a short burst (40 s) of UV irradiation at 253.7 nm (0.64 mW/cm2). This is referred to as ‘active DI virus’. The UV inactivation target is viral RNA, and UV

has little effect on the DI RNA because of its small target size, 395 nt compared with 13,600 nt for infectious virus. Longer UV irradiation (8 min) inactivated mouse-protecting activity MLN0128 in vivo and provided a preparation that controlled for any immune system-stimulating or receptor-blocking effects (‘inactivated DI virus’). However, UV treatment did not completely destroy all DI RNA. UV did not affect haemagglutinin or neuraminidase activities. We used wild type C3H/He-mg (H-2k) mice (bred in-house), wild type Balb/c (H-2d)

mice (Harlan UK Ltd.), and mutant Balb/cJHan™Hsd-Prkdcscid mice (Harlan) with a defect in the Prkdc gene which encodes DNA-PK. This leads to aberrant VDJ recombination and hence deficient B and T cells. SCID mice have a normal complement of NK cells. Wild-type Balb/c mice required Sodium butyrate 2 × 103 ffu of WSN challenge virus to cause consistent but non-lethal clinical disease; this was twice the dose needed for C3H/He-mg mice [18]. Balb/cscid mice were also infected with 2 × 103 ffu of WSN. Adult mice (4–6 weeks old) were inoculated intranasally under light ether anaesthesia as previously described [33] and [34], with a 40-μl inoculum divided between the two nares. Mice were given various combinations of active DI virus, UV-inactivated DI virus, infectious challenge virus (A/WSN), or diluent. Infectious challenge viruses were titrated in mice to determine a dose for each that caused comparable respiratory disease. The health of mice was assessed clinically and by change in group weight [33].

The purification of the antimicrobial compound was carried by usi

The purification of the antimicrobial compound was carried by using silica gel column (2.5 × 25) chromatography. Silica gel of 100–200 μm mTOR inhibitor particle size was used for packing the column. Chloroform and methanol (7:3, v/v) were used as an

eluting solvent. 5 g of crude extract to be fractioned was dissolved in 50 ml of methanol and passed through the silica gel column keeping the flow rate at 0.2 ml/min; thirty fractions were collected (5 ml each) and tested for their antimicrobial activities. The purity of the active fraction was determined by Waters Reverse Phase HPLC, Spherisorb 5 μm ODS 2 (C18) column with solvent system methanol and water 70:30 (v/v) at 2500 psi in isocratic mode. The operating flow rate was 1.0 ml/min. The solubility pattern of the compound was determined in various polar and non-polar solvents. The melting point of the compound was determined by Fisher–Johns melting point apparatus. The UV absorption spectrum of the compound was determined by Shimadzu www.selleckchem.com/products/r428.html UV 1800 spectrophotometer. The Infra-red (IR) spectrum of the purified antimicrobial compound was recorded using Bruker Alpha FT-IR spectroscopy. The resulting data

generated was viewed with the help of OPUS v6.5 software. NMR spectrum of the compound was determined by using an AMX-400 spectrometer (Bruker, Germany) 1H data was obtained at 399.7 MHz and 13C was at 100.5 MHz using chloroform-d as solvent and trimethylsilane as internal reference. The minimum inhibitory concentration has been determined by broth dilution method.12

The media used were nutrient broth for bacteria and Czapek Dox broth for fungi. The optimization of the metabolite production was carried out in batch cultures. The isolate BTSS-301 was cultivated in basal medium supplemented with different carbon sources, and their effect on growth and antimicrobial activity was studied (Table 1). The isolate grow in all the test carbon sources. Maximum metabolite production was obtained with glucose (160 μg/ml) followed by glycerol (120 μg/ml) and starch (112 μg/ml) and the biomass obtained was also highest with glucose (3 mg/ml) than that of glycerol and starch. The effect of different concentrations Ketanserin of glucose (Fig. 1) on growth and production showed that the antibiotic titer was highest with 10 g/l glucose concentration with biomass of 3.6 mg/ml. Among the various inorganic nitrogen sources, the maximum metabolite production was achieved with NH4NO3 (192 μg/ml) with biomass of 3.8 mg/ml. Among the organic nitrogen sources, the high level of metabolite yield was obtained with soyabean meal (Table 2). Further, the concentration of 2.5 g/l of NH4NO3 (Fig. 1) greatly influenced the antimicrobial compound production with maximum yield and biomass accretion of 3.3 mg/ml. Moreover the yield was reduced with increase and decrease of NH4NO3 concentration.

The feedlot’s standard operating procedures were followed for cat

The feedlot’s standard operating procedures were followed for cattle care and management; sprinklers were used as needed to reduce heat stress risks. Kansas State University (KSU) Institutional Animal Care and Use Committee approved the study (#2723). The study was designed

as a randomized complete block with a 2 × 2 factorial treatment structure. A priori sample size estimates were generated by data simulation and power calculations; assumptions included: 40% mean control group prevalence of E. coli O157:H7 [16], 25% mean prevalence in pens receiving an intervention, and no interaction among interventions. Forty pens (10/treatment) and 120 samples (30/week for four weeks) per pen were considered sufficient for 80% statistical power to detect expected treatment differences with a 5% Type 1 error. Individual cattle were randomly Fulvestrant chemical structure allocated to 40 pens grouped in 10 blocks (defined based on allocation this website dates; March 31 through May 14, 2011). Within block, one pen each was randomly allocated to one treatment: control, administered vaccine (VAC), fed DFM (DFM), or both VAC and DFM (VAC + DFM). Cattle in VAC and VAC + DFM groups were administered a 2 mL dose of the

vaccine subcutaneously (SC, 1½ in. needle) in the left lower neck on study day 0 and again three weeks later (E. coli SRP® vaccine, Pfizer Animal Health, New York, NY, USA; lot # 840-0006, expiration August 19, 2011). Cattle allocated to DFM or control groups never received a placebo and were not re-handled three

weeks following enrollment. The DFM, labeled for 106 CFU/animal/day of L. acidophilus and 109 CFU/animal/day of Propionibacterium freudenreichii, was fed throughout the study periods (Bovamine®, Nutrition Physiology Corp., Guymon, OK, USA). On study day 0, all cattle received a herpes virus vaccine (Pyramid IBR, Boehringer Ingelheim these Vetmedica Inc., St. Joseph, MO, USA; 2 mL, SC) and a growth promoting implant (Synovex Choice, Pfizer Animal Health, New York, NY, USA; SC in the left ear). The feedlot’s computer system randomly allocated animals to treatment groups as they were handled on study day 0. For each block, four contiguous pens within the feedlot were identified and pen locations for treatment groups within blocks were then randomly allocated using the computer’s randomization algorithm. The primary study outcome was within-pen E. coli O157:H7 prevalence, whereas within-pen prevalence of high shedding animals was considered a secondary outcome. Thus, each sample was classified twice (independently) as positive or negative to: (1) a culture procedure including immunomagnetic bead separation (IMS) to assess fecal shedding, and (2) a direct plating culture procedure to assess high shedding. Laboratory personnel were blinded to treatment: samples were tracked only by sequential numbers.

A cherry hemorrhage

A cherry hemorrhage selleck chemicals llc is an isolated, single, circular, elevated bleed, typically in the equatorial retina, that is observable by gross examination (Figure 4, Top left). Smaller cherry hemorrhages are focal hemorrhagic detachments of the ILM without an obvious break (Figure 3, Top right). Larger ones, microscopically, show a retinal ridge with torn ILM canopy surrounding blood and fibrin beneath (Figure 4, Top right and Bottom left). Ultrastructurally, the basement membrane

of the ILM is composed of attached vitreous fibrils on one side and Müller cell remnants on the other (Figure 4, Bottom right). Every eye with a cherry hemorrhage had at least 1 documented ILM tear elsewhere in that eye. Two patients (4 eyes) in our series survived abusive head trauma 2 years prior to their death (abusive head trauma survivor group). The first patient was a 30-month-old boy who died in bed with vomit around his face and survived shaking at 8 weeks by the confessed biological father, resulting in quadriplegia and cortical blindness SCR7 molecular weight until death. The second patient was a 3-year-old girl who survived abusive head trauma at 1 year by the mother’s boyfriend, resulting in severe neurological injuries and a severed spinal cord, ultimately succumbing to death from respiratory

failure. Histopathologic eye findings were similar in both children; those findings are a thin, over cupped optic nerve with bowed lamina cribrosa; macula with torn ILM; and a thin nerve fiber layer with loss of ganglion cells, as well as absent macular/temporal axons consistent with optic nerve and macular ganglion cell degeneration (Figure 5). The optic nerve was demyelinated and no hemorrhage or hemosiderin was detected. Perimacular folds, first described by Greenwald and associates14 in 1986, are considered

a specific finding for abusive head trauma in the appropriate clinical situation, but not pathognomonic. We found perimacular folds in nearly half of abusive head trauma eyes. Although not a sensitive finding, they are specific for high-acceleration trauma. Two eyes from 1 accidentally drowned infant case showed perimacular folds; it is highly probable that these resulted from frantic resuscitative shaking efforts by family members. Consistent with our previous hypothesis, perimacular folds were found only in situations suspicious for severe acceleration–deceleration motion to a child’s head, including the above case. Otherwise, no cases with relatively minor trauma had associated perimacular ridges. Though alternative causes like suffocation did not demonstrate pathology similar to abusive head trauma, it is important to note that these other mechanisms can be part of an abusive picture without being detected by histopathology.

This was achieved by enhancing the solubility of the lipophilic M

This was achieved by enhancing the solubility of the lipophilic MPTS with the application of FDA approved co-solvents, surfactants and their combinations. The aim of the animal studies was therefore dual as the test not only gave answer

to the in vivo efficacy of the drug candidate CH5424802 cost but would also answer the question of whether the drug shows a fast enough absorption from an intramuscular injection for combating cyanide intoxication. Materials for the conversion test were potassium cyanide (KCN), formaldehyde, ferric nitrate reagent, monobasic sodium phosphate monohydrate and dibasic sodium phosphate anhydrous (VWR International, Suwanee, GA, USA). Methyl propyl trisulfide (50% purity; water solubility = 0.15 ± 0.003 mg/ml) was purchased from Sigma–Aldrich (St. Louis, Missouri, USA), TS were selleck screening library purchased from VWR International (Suwanee, GA, USA). Ethanol, PEG 200, PEG 300, PEG 400, PG (VWR International, Suwanee, GA, USA), Cremophor EL, Cremophor RH40, sodium cholate, sodium deoxycholate, polysorbate 80 (Sigma Aldrich, St. Louis, MO, USA) were used as solubilizers. Cyclohexanone (Sigma–Aldrich, St. Louis, MO, USA) was used as solvent for the GC–MS measurements. KCN solutions (1.0 mg/ml and 3.5 mg/ml) were used throughout the animal studies. 250, 100 and 50 μl Hamilton

Luer-lock syringes (VWR International, Suwanee, GA, USA) were used in the animal studies with 27G 1/2 needles for intramuscular and of 25G 1½ needles (VWR International, Suwanee, GA, USA) for subcutaneous injection. In vitro efficacy of MPTS was determined based on

its ability to convert CN to SCN. The method applied was a spectrophotometric measurement of the formed SCN based on the method of Westley (1981) with minor modifications ( Petrikovics et al., 1995). Briefly, 200 μl of various concentrations of SDs, 200 μl of 10 mM phosphate buffered saline, 200 μl of 250 mM KCN and 400 μl of deionized water were mixed. The reaction was incubated for 5 min and was quenched with 500 μl of 15% (v/v) formaldehyde. 1.5 ml of ferric nitrate reagent was added to form a reddish brown complex (Fe(SCN)3) that was quantitatively determined at 464 nm using a spectrophotometer (Thermo Fisher Scientific, Waltham, MA, USA). Tests were performed with MPTS and TS at concentrations ranging from 25 mM to 0.156 mM with two fold serial dilutions in between. The solubility of MPTS was determined in co-solvents, surfactants and their combinations. Aqueous solutions of co-solvents and surfactants were prepared at 10%, 25%, 50%, 75%, 90% and 1%, 5%, 10%, 15%, 20% respectively. Based on the solubility enhancing efficacy of the co-solvent/water and surfactant/water systems the most effective excipients were combined into one system forming a co-solvent/surfactant/water system.

Interventions: Both groups were trained

for 4 weeks (40 m

Interventions: Both groups were trained

for 4 weeks (40 min/day, 5 days/week). In the RFE group, repetitive facilitative techniques were used to elicit movement of different joints of the paretic upper limb. Each subject received a total of 100 standardised movements of at least 5 joints in the paretic upper limb. The BTK inhibitor chemical structure control group underwent conventional training consisting of range of motion exercises, progressive resistive exercises, and grasping blocks of various sizes. In addition, all subjects, regardless of group assignment, received dexterity-related training for 30 min at the end of each exercise session. Outcome measures: The primary outcome was the Action Research Arm Test (ARAT) scored 0–57 with higher scores indicative of higher levels of function. The secondary outcome was the Fugl Meyer Arm Motor Scale (FMA), with a maximum score of 66. The outcomes were measured at baseline, at 2 weeks after the initiation of the intervention, and immediately after the 4-week training program. Results: 49 participants completed the study. At the end of the 4-week training period, the improvement in ARAT total score

was significantly more in the RFE group than the conventional exercise group (by 6.5 points, 95% CI 2.0 to 11.0). Analysing the ARAT subscale scores revealed that the RFE group had significant more improvement than the conventional exercise group in Grasp (by 2.5 points, 95% CI 0.7 to 4.3) and Pinch subscales (by 2.7 points, 95% CI 0.7 to 4.6), but not Grip (by 0.9 points, 95% CI −0.2 SB203580 concentration to 1.9) already and Gross Movement subscales (by 0.5 points, 95% CI −0.5 to 1.4). The FMA score also demonstrated significantly more improvement in the RPE group than the conventional exercise group (by 5.3 points, 95% CI 1.0 to 9.5). Conclusion: The RPE program is more effective than conventional exercise training in improving upper limb motor function in people with subacute stroke. The recovery of upper limb movement and use post stroke is a priority for both the client and therapist.

Over the past decade numerous trials have investigated upper limb interventions and their effect on improved movement and use in activities of daily living (ADL) with positive results (Harris et al 2009, emsp Wolf et al 2010, emsp Arya et al 2012). Trials have progressed to determine the intensity aspects of intervention. Shimodozono and colleagues developed and investigated an intervention that contributes to this discussion. Research has shown that hundreds of repetitions are necessary to improve use of the paretic upper limb in ADL (Birkenmeier et al 2010). Trials that determine key ingredients of the interventions (eg, dosage, activity, repetitions) will assist therapist decision making and improve client outcome; this is being done for Constraint-Induced Movement Therapy (Page et al 2013).

Two ml of OptiPhase HiSafe 2 scintillation fluid (Perkin Elmer, <

Two ml of OptiPhase HiSafe 2 scintillation fluid (Perkin Elmer, 3-MA concentration Cambridge, UK) was added to each sample and radioactivity determined in a Wallac 1409 liquid scintillation counter (Wallac, Turku, Finland). For permeability assessment of the fluorescent dye Rhodamine123 (Rh123), experiments

were set up similarly to radioactive transport experiments outlined above with the donor solution comprising 5 μM Rh123 in SBS. Every 30 min for a 2 h period, 100 μl samples were taken from the receiver chambers and analysed neat. The 10 μl samples from the donor wells were diluted 1:99 with SBS and 100 μl of this used for analysis. All samples were transferred to a black 96 well plate and analysed at an excitation wavelength of 485 nm and emission wavelength of 538 nm using an Infinite® M200 PRO spectrophotometer (Tecan, Reading, UK). The Rh123 concentration in each sample was determined from a calibration curve. Apparent permeability coefficients (P  app) were calculated using the

following equation: Papp=dQ/dtAC0 where dQ/dt is the flux of the substrate across the cell layer, A is the surface area of the filter and C0 is the initial concentration of the substrate in the donor solution. For all TEER and permeability data generated, results were expressed as mean ± SD. Datasets with n ⩾ 5 were assessed for normality and the data fitted a normal (Gaussian) distribution. Therefore normality was assumed for all datasets PF-2341066 where n < 5 and each were compared using a two-tailed, unpaired Student’s however t-test with Welch correction applied (to consider unequal variance between datasets). Statistical significance was evaluated at a 99% confidence level (p < 0.01). All statistical tests were performed using GraphPad InStat® version 3.06. The barrier properties of RL-65 cell

layers were assessed by TEER measurements, expression of the tight junction protein zo-1 and permeability of the paracellular marker 14C-mannitol. TEER was measurable from day 4 after seeding for RL-65 cells cultured in both media (Fig. 1). At passage 3, cells cultured in SFM either at an AL interface or under submerged conditions displayed a similar TEER profile with maximal TEER between days 8 to 10 in culture. Thereafter, this steadily declined to <100 Ω cm2 at day 18 in culture, when cells had detached from the filters (Fig. 1A). At day 8 in SFM, cell layers cultured at the AL interface produced significantly higher (p > 0.01) TEER values (667 ± 65 Ω cm2) compared with their submerged culture counterparts (503 ± 50 Ω cm2). At later passages, (passages 6, 9 and 12) maximal TEER values after 8 days in culture were 200–400 Ω cm2 (data not shown), in agreement with TEER values obtained by Wang and co-workers ( Wang et al., 2009). The TEER profile for submerged RL-65 cell cultures maintained in SCM was similar to that in SFM.

We also must not ignore the complexity of integrated record devel

We also must not ignore the complexity of integrated record development and annual maintenance of these documents,

including the annual procurement and periodic revision processes as well as more complex discussions of sustainable financing across contributing programmes, all of which inherently creates scenarios of increased risk of stock-outs or shortages of cards for the annual birth cohort. Good clinical and public health practice benefits from good documentation standards that reflect the importance of complete, timely, and accurate recording of information. Immunization programme documentation standards, selleck as reflected by our review of home-based vaccination records, differ substantially from country to country

and at times within countries. Implementation of documentation standards and operational EGFR inhibitor practice in the field likely varies even more so. Our review assessed the content of cards based on instructions and content as printed and cannot detect variations in field use which likely exist (e.g., stamps that might be used in some fields or practices of recording additional information in a field such as recording lot number in a column labelled “comments”). The World Health Organization is currently refining guidelines for the content and basic structure of home-based child vaccination records. Although that work is on-going, we would like to highlight the following items which are almost certainly to be reflected in the guidelines

in as much as these are derived from general principles of high quality medical records, whether paper- or computer-based. • Perhaps unique to home-based paper records, the physical medium (e.g., water- and tear-resistant paper, heavier card stock paper) used for the document is important to consider given the often harsh conditions to which the document is exposed. Alternatively or in addition, a protective sheath or sleeve can be considered to protect the record. In summary, the role of the home-based vaccination record as basic medical record is clear. The different forms of home-based child vaccination records SB-3CT [7] reflects integration with other child survival programme areas; however, it remains an open question as to whether there are related adverse impacts on the quality of documentation following receipt of immunization services. We expect home-based vaccination records to continue to evolve particularly with respect to adoption of new and more effective designs and incorporation of technology such as use of bar codes or embedded microchips to facilitate transitions to electronic based systems.

Passive surveillance is based on the reporting of confirmed or su

Passive surveillance is based on the reporting of confirmed or suspected cases encountered by health care workers. However, as most dengue cases are ambulatory, and not always seen by health care workers, this system results in significant under-reporting. Under-reporting also results from the lack of a universally C646 chemical structure applicable or uniformly applied case definition [16]. Improving the availability and reliability of diagnostics for dengue is a major priority. Recent recommendations from the Asia-Pacific and Americas Dengue Prevention Boards (organised by the Dengue Vaccine

Initiative Consortium) include: making the reporting of dengue mandatory, use of electronic reporting systems, application of minimum reporting requirements and sharing of expertise and data [15]. To obtain support from governments and global decision-makers, a dengue vaccine must be shown to be cost-effective. This requires accurate data on the economic costs of dengue. Dengue is responsible for an annual

estimated global burden of 750,000 disability-adjusted life years (DALY) Selumetinib molecular weight [6], [17] and [18]. A study across eight countries in Asia and Latin America estimated that the mean cost per hospitalised case of dengue is US$571, of which 76% was direct costs and 24% indirect costs [19]. For ambulatory cases the mean cost per case was US$248, of which 28% was direct costs and 72% indirect costs [19]. Another study estimated the total cost of dengue illness across the Americas (based on data from 2000 to 2007) at US$2149.8

million per year, with a total of 72,772 DALY lost [17]. Ambulatory cases accounted for 73% of the costs, hospitalised cases 24%, PD184352 (CI-1040) and deaths 3% [17]. A comprehensive review of health economic studies of dengue burden has recently been published [20]. Such cost studies face two main challenges: (i) it is difficult to incorporate all of the costs of a case of dengue, and (ii) incidence of dengue is considerably under-estimated. Expansion factors are used to adjust for the under-reporting of cases and provide estimates of the true extent of the dengue burden [21]. Expansion factors of 10–27 in Puerto Rico [22], 6 in Panama [23] and 21.3 in Nicaragua [24] have been reported. While different expansion factors for different countries might be expected given differences in surveillance systems, the wide variation observed calls for a systematic and comprehensive analysis of dengue under-reporting. Indeed, reliable expansion factors will be essential to calculate the full cost of dengue. The threshold for vaccine cost-effectiveness recommended by the WHO is a cost per DALY saved of three times the annual per capita gross domestic product (GDP) [25]. For dengue-endemic countries in the Asia-Pacific region this threshold is approximately US$3000. The cost-effectiveness of a dengue vaccine in Southeast Asia was calculated assuming a two-dose schedule and different potential prices per dose [26] and [27].