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LIVE POLIO IRUS VACCINES

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Vaccination of Full-Term Infants with Attenuated Polioviruses<br />

297<br />

u<br />

u4<br />

o<br />

32<br />

r.4<br />

16<br />

8 ROL RT VAICCINFTION<br />

_-O 0-7 DVYS<br />

O--O 8-35 »<br />

... ®- 36-70 »<br />

O---O 71-I40 »<br />

-I-T-T--r- 1--r-T--r- 1--r-r-T-1-T-v----r-I-T--r-i-- 1-<br />

4 8 16 20 Z4<br />

A1Qe<br />

irn Weeah<br />

FIc. 1. Antibody titers at approximately 1, Z and 3 months after the vaccination of infants<br />

are shown. The infants are divided into those vaccinated at 0-7, 8-35, 36-70, and more than 71<br />

days of age. The first value for each group represents the mean titer at the time of vaccination.<br />

TABLE 7.<br />

TESTS OF HYPOTHESIS OF IMMUNOLOGIC TOLERANCE IN FULL-TERM INFANTS<br />

Infant First Infection Second Infection<br />

No. (Attenuated Virus) Virus Age Fecal Post-Vacc.<br />

Age Fecal Post-Vacc. Virus Antibody<br />

Virus Antibody<br />

103 4 d. +

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