LIVE POLIO IRUS VACCINES

Immunological and Epidemiological Effectiveness of Live Polio Vaccine 491
TABLE 5.
SUSCEPTIBILITY TO POLIOMYELITIS OF THE CHILD POPULATION OF THE BYELORUSSIAN
SSR BEFORE, AND 6 MONTHS AFTER, TWO-STAGE IMMUNIZATION WITH LIVE VACCINE
Age of Ie/lore oaccinalion Alter vuccinaliol,
chiildren wilthout antibodies NU o w¿/lhooul trliihcldlii,;
in ues- N ° of to polioui ruses childrcn to poliovuirlI.'s.
hgated children Type Type Type Al inefs yp' .ypc y c 1
(years) 60 ¡ 65 6 tiRated 19 ¡ 11 1 5
6-2 55 60 65 65 36 68 19 11,7 19 1,5
3-4 22 45 54 50 22 49 8 6,1 8 2
5-6 15 40 53 26 0 67 1, 5 1,5 4,5 0
7-9 45 31 37 33 13 60 1,5 16,6 10 1,6
10-12 48 35 50 27 20 51 11,7 11,7 13 0
13-15 35 28 31 17 0 31 9,7 3,2 3,2 0
Total 220 326
TABLE 6. SUSCEPTIBILITY TO POLIOMYELITIS OF A CHILD POPULATION IN THE LATVIAN SSR
BEFORE VACCINATION AND 6 MONTHS AFTER DOUBLE IMMUNIZATION WIT'H LIVE VACCINE
B(/ore (accinutio
A/lter vaccination
Age N° % wuithotlI (lil/hodie.s % wuithout antibodies
/ children NO to poliouiruscs Al to poloinortisesC
(f oI(hildren yh/rc
rolIchil c
tUiated Typel/ Typl/ TypelI t igaed TI res
0-2 67 64 78 66 41 33 0 1O 3 0
3-4 45 42 50 35 20 30 10313 0
5-6 44 25 413 6 4 10O 5 22 0
7-9 72 25 39 29 4 67 2 1 12 O
10-12 43 19 34 27 0 84 2 5 f4 0
13-15 25 16 22 4 O 78 1f 5 0
16-20 22 1618 10 0 56 106 16
Total 318
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3B9 1 1