Natural vs Vaccine Immunity


http://www.nejm.org/doi/full/10.1056/NEJM197010082831501
” On the basis of hemagglutination-inhibiting and complement-fixing antibody responses, 80 per cent of those vaccinated and 3.4 per cent of those who were naturally immune were reinfected.”

http://www.sciencedirect.com/science/article/pii/0264410X94900094
” Naturally immune recruits had significantly higher antibody titres (1:160) than the recruits belonging to the vaccinated age group (1:54). However, 23% of the unvaccinated recruits lacked antibodies against rubella.”

http://jid.oxfordjournals.org/content/146/2/260.short
” Although the serum IgG antibody responses persisted for at least eight to 12 months (to date) after either form of infection, the antibody activity appeared to be four- to eight-fold higher after natural infection than after immunization.”

http://cid.oxfordjournals.org/content/7/Supplement_1/S80.short
” Natural infection with wild virus was shown to induce more vigorous immune responses than did either vaccine: antibody titers were higher, decreases were smaller, and none fell to <1:8 (HAI) or <1:4 (NT). “