A study tracks the concentration of specific antibodies in a volunteer's blood following vaccination. The volunteer receives a primary vaccine dose at day 0 and a booster dose at day 24. The graph below shows the changes in antibody concentration over a 40-day period.
Using the data from the graph:
a.[2]
Calculate the percentage increase in peak antibody concentration from the first peak to the second peak.
b.[3]
Calculate and compare the mean rate of increase in antibody concentration (in AU/day\text{AU}/\text{day}AU/day) from the day of injection to the peak concentration for both:
- the primary dose (from day 0 to day 12)
- the booster dose (from day 24 to day 28)