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LIVE POLIO IRUS VACCINES

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290<br />

Efficacy-Laboratory Evidence<br />

TABLE 5. ANTIBODY TITERS BEFORE AND AT INTERVALS AFTER VACCINATION AT BIRTH AND IN UN-<br />

VACCINATED INFANTS<br />

ANTIBODY RESPONSE<br />

BEFORE<br />

VACCINATION<br />

AFTER VACCINATION<br />

Positive*<br />

Median<br />

Mean**<br />

Age<br />

O mo.<br />

8<br />

(6) t<br />

12<br />

1 ?/0o.<br />

32<br />

(12)<br />

42<br />

2 110o.<br />

32<br />

(9)<br />

30<br />

3 ??0o.<br />

32<br />

(7)<br />

35<br />

4-6 lmo.<br />

8<br />

(7)<br />

14<br />

Negative*<br />

Median<br />

Mean<br />

32<br />

(16)<br />

27<br />

8<br />

8<br />

(13)<br />

7 6<br />

(7)<br />

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