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LIVE POLIO IRUS VACCINES

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250 Efficacy-Laboratory Evidence<br />

LOG.TCD 5 0 /G.<br />

K.E.<br />

FIG. 2.<br />

P.N. R.P. F.U.<br />

Examples of simultaneous multiplication of vaccine strains on feeding live trivalent vaccine.<br />

TABLE 16. ESTABLISHMENT OF TYPE 2 VACCINE V<strong>IRUS</strong> IN PERSONS IMMUNIZED WITH TRIVALENT<br />

<strong>LIVE</strong> VACCINE, IN RELATION TO THE PRESENCE OR ABSENCE OF <strong>POLIO</strong>MYELITIS ANTIBODY<br />

ANTIBODY<br />

CHILDREN<br />

2° 10 20 30 2+<br />

1+2+3+<br />

No. tested<br />

Excreted virus<br />

_<br />

50 24 86<br />

41 20 27<br />

33<br />

11<br />

Per cent<br />

82 71 31<br />

30

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