LIVE POLIO IRUS VACCINES

248 Efficacy-Laboratory Evidence
TABLE 11.
FREQUENCY OF TYPE 1 VIRUS EXCRETION BY WEEKS
(CHILDREN'S HOMES No. 5 AND No. 10)
WEEK
NUMBER OF CHILDREN 1 2 3 4 1-4 5-8
Tested 99 61 101 86 118 101
Excreted virus 70 29 47 31 97 41
Per cent 70 47 46 36 82 40
TABLE 12.
FREQUENCY OF TYPE 2 VACCINE VIRUS EXCRETION BY WEEKS
WEEK
NUMBER OF CHILDREN 1 2 3 4 1-4 5-8
Tested 99 61 101 86 118 101
Excreted virus 76 34 61 40 103 46
Per cent of excretion 77 56 60 45 87 45
TABLE 13.
FREQUENCY OF TYPE 3 VACCINE VIRUS EXCRETION BY WEEKS
WEEK
NUMBER OF CHILDREN 1 2 3 4 1-4 5-8
Tested 99' 61 101 96 118 101
Excreted virus 47 36 34 29 76 36
Per cent of excretion 47 60 33 30 64 35
TABLE 14.
SUMMARY TABLE ON THE FREQUENCY OF TYPES 1, 2, AND 3 VACCINE VIRUS EXCRETION
BY WEEKS (IN PER CENT)