LIVE POLIO IRUS VACCINES

166
Safety-Field Evidence of Safety
dence that any of these five individuals had picked
up Type 2 poliovirus.
Poliovirus Type 1 was isolated from 12 children
in seven group A families; the identity of
these individuals, the chronological data of the
stool specimens and the antibody titers vs. Type
1 poliovirus are shown in Table 3. Type 1 poliovirus
was isolated from three children in family
No. 29. The virus was isolated earliest (from the
third stool specimen submitted) from the threeyear-old
(29-3) and later from her and her two
younger brothers. Type 1 poliovirus was isolated
from four individuals in family No. 165.
The virus was isolated earliest from the eightmonth-old
infant (165-6) and later from her
and her three older brothers. The remaining
TABLE 3. IDENTITY OF THE 12 PLACEBO-FED INDIVIDUALS FROM WI-IOM TYPE 1 POLIOVIRUS WAS
ISOLATED AND THEIR TYPE 1 ANTIBODY TEST RESULTS
INDIVIDUAL IDENTITY
STOOL SPECIMEN DATA
TITER
TYPE 1 POLIOVIRUS ANTIBODY
FAMILY NO.
AND
PERSON No.
SEX
AGE
No. OF
SALK
SHoTs
ORDER
No.
No. OF DAYS*
SINCE VIRUS
FEEDING
PRE-
POST
CONTROL
POST
FEEDING
29-3
Fe
3
3
3rd
4th
5th
6
26
49