LIVE POLIO IRUS VACCINES

Vaccination and Challenge-Poliomyelitis in Nicaragua
551
FIGURE 3
NOTIFIED CASES OF PARALYTIC POLIOMYELITIS, BY WEEK OF ONSET, IN THE DEPARTMENT
MANAGUA AND ALL OF NICARAGUA DURING EPIDEMIC PERIOD 1959-1960
1959
NOV. |
DECEMBER
1960 M N T H
JANUARY [ FEBRUARY ¡ MARCH
i i , 1 I i i . i I
1 APRIL ¡ MAY
OF
-24
24-
22-
- 22
20-
20
18-
18
16-
16
u
o
i
'1
z
14-
2
I
14 ,
o
12 -
10 z
12- ... . - 0 : - ';. _
8
6
10
8~~~~~~~~~~~~~~~~
4
n 5 o 1q17 11 ~ T9
4 ' 51 S 521 1 2 3 14 ¡ 5 61 7 8
ti 22 -2/NOV /59
WEEKS
9 ' 10 11 12 13 1 14 15
10 l./MAy/6O
o
] IN THE DEPARTMENT OF MANAGUA
:] IN ALL OF NICARAGUA
1, 3, and 4). Four deaths were recorded, giving
a case fatality rate of 1.8 per cent versus 7.1
per cent in 1958.
Thirteen of the 16 departments of Nicaragua
were involved in the epidemic. Of the 92 cases
in Managua, 88 were recorded in the City of
Managua and four in other communities of the
Department (Fig. 2). As in 1958, the highest
incidence of poliomyelitis in the rest of the coun-
try was observed in the Departments of Chinandega,
León, and Masaya.
If we consider collectively the 225 cases reported
in the country from 1 January 1959 to
14 May 1960 (Table 3), it can be noted that as
in 1958, 75 per cent of these cases were in
children less than two years of age. However,
the proportion of cases in this age group in
Managua in 1959-1960 was 74 per cent versus