after k + l vaccine the gmt may be negative after 15 years or less , but this will depend on the frequency of natural boosting . ( 4 ) on revaccination after five to ten years , one out of 20 children ( five per cent ) who had received live vaccine alone for primary vaccination showed a fourfold or greater rise in titre of hai antibody , whereas 17 out of 41 children ( 41 % ) who had received k + l vaccine showed a significant rise in titre . ( 5 ) with either regime , the age at primary vaccination did not appear to influence the rate of boosting after revaccination except perhaps in children under two years . ( 6 ) among those who originally received k + l vaccine , the lower the hai antibody titre before revaccination and the longer the time since primary vaccination , the more likely was a significant rise in titre to occur after revaccination .
C0042211
live vaccine
C0042210
vaccine