the other variant , which was pathogenic for rhesus monkeys , was characterized by greater immunogenicity but when given as a live vaccine caused acutely febrile reactions and other side-effects in 10 % of inoculated persons 6 to 8 days after administration.in persons vaccinated with the avirulent vaccine , the antibodies were maintained for over 3 years compared with only 1 year after administration of a killed vaccine .
C0042211
live vaccine
C0042210
vaccine