Fig. 7
(a) An illustration of protection time calculation toward asymptomatic infection. First dose is injected at the initial time unit, second dose is injected at 50th time unit. Both injection dosages of antigen substances are 106. Single live virus invaded at 200th time unit. The protection duration and subsequent infection curve are both marked in this figure. (b) An illustration of protection time calculation toward symptomatic infection. First dose is injected at the initial time unit, second dose is injected at 50th time unit. Both injection dosages of antigen substances are 106. Single live virus invaded at 400th time unit. The protection duration and subsequent infection curve are both marked in this figure.
