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LIVE POLIO IRUS VACCINES

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Virologic, Serologic Investigations of Immunization With Sabin's Strains 251<br />

LOG.TCD 50 /G.<br />

61<br />

L.B.,<br />

31/2 months<br />

36 DOays<br />

_ Type I<br />

m w m Type II<br />

mee Type III<br />

FIc. 3.<br />

R.L.,<br />

2 years<br />

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

TABLE 17. ESTABLISHMENT OF TYPE 3 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 />

No. tested<br />

CHILDREN<br />

30<br />

96<br />

10 2 ° 30 3+ 1+2+3+<br />

number of children developing antibody after<br />

vaccination in the winter and in the summer was<br />

observed for Type 1 and Type 3 antibody (17.2<br />

and 9.0 per cent, respectively).<br />

Table 21 and Figures 5, 6, and 7 present antibody<br />

titers in vaccinated children. It may be<br />

seen, that Type 1 antibody developed most often<br />

in titers 1:16-1:64; 25 per cent of the children

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