LIVE POLIO IRUS VACCINES

Effectiveness of Trivalent Vaccine in Immunizing Young Children
119
TABLE 6.
d MARKERS OF 40 STRAINS FROM VACCINEES AND CONTACTS
WEEKS P VACCINATION TOTAL
TYPE SOURCE 1-2 3-4 6-7 STRAINS
D- i D+ D- I D+ D- í D+ TESTED
12 VACCINEES I O O 3 4 0 4 3 0 15
II CONTACTS 1 4 .I 0 6 1 13
3 VACCINEES 2 1 0 3
I CONTACT 0 I 0 I
5 VACCINEES 4 0 0 I I I 7
I1 CONTACT 1 0 0
Dr. Juan A. Montoya, Pan American Sanitary
Bureau Epidemiology Consultant, and Dr. Joaquín
Nufiez, Technical Director, National Campaign
against Poliomyelitis, Costa Rica; also to
Mrs. María José Ramírez Vargas and Miss Jael
Chacón Zamora, Santo Domingo de Heredia
Health Center, and Mrs. Mary Morales, Ministry
of Health, San José, Costa Rica. Without the
cooperation of these individuals this study would
not have been possible.
REFERENCES
1. Prem, K. A., and McKelvey, J. L.: Antibody
response in adults and children following
simultaneous oral administration of three
type strains of live attenuated poliomyelitis
virus. In: Live Poliovirus Vaccines, First
International Conference. Scient. Pub. no.
44 of the Pan American Health Organization,
pp. 249-253, 1959.
2. Cox, H., Cabasso, V. J., et al.: Immunologic
response to trivalent oral poliomyelitis vaccine.
In: Live Poliovirus Vaccines, First
International Conference. Scient. Pub. no.
44 of the Pan American Health Organization,
pp. 229-248, 1959.
3. Chumakov, M. P., Voroshilova, M. K., et al.:
Preliminary report on mass oral immunization
of population against poliomyelitis with
live virus vaccine from A. B. Sabin's attenuated
strains. In: Live Poliovirus Vaccines,
First International Conference. Scient. Pub.
no. 44 of the Pan American Health Organization,
pp. 517-529, 1959.
4. Smorodintsev, A. A., Ilyenko, V. I., et al.:
Part 2. Virological and immunological characteristics
of vaccinal infection in children
inoculated per os with a live poliomyelitis
vaccine made from the Sabin strains. In:
Live Poliovirus Vaccines, First International
Conference. Scient. Pub. no. 44 of the Pan
American Health Organization, pp. 312-323,
1959.
5. Prem, K. A., McKelvey, J. L., and Fergus, J.:
Immunologic response of infants under six
months of age to oral trivalent poliomyelitis
vaccine. In: Live Poliovirus Vaccines, First
International Conference. Scient. Pub. no.
44 of the Pan American Health Organization,
pp. 254-259, 1959.
6. - , , - : Immunologic response
of pregnant women to oral trivalent
poliomyelitis vaccine. In: Live Poliovirus
Vaccines, First International Conference.
Scient. Pub. no. 44 of the Pan American
Health Organization, pp. 260-269, 1959.