Table 1.
Estimated occurrence of encephalitis and encephalopathy in Japan by year
| Year | Population slated for vaccination (% actually vaccinated)a | Encephalitis/encephalopathy (deaths) | Incidence per million (deaths) |
|---|---|---|---|
| 1965 | 1125572 (68.0) | 19 (8) | 16.9 (7.1) |
| 1966 | 1070219 (67.3) | 11 (3) | 10.2 (2.8) |
| 1967 | 975315 (60.6) | 17 (7) | 17.7 (7.3) |
| 1968 | 1162468 (70.5) | 16 (5) | 13.7 (4.3) |
| 1969 | 1189549 (64.7) | 15 (3) | 12.6 (2.5) |
| 1970 | 819174 (43.9) | 18 (11) | 21.9 (13.4) |
| 1971 | 937221 (50.3) | 36 (3) | 38.4 (3.2) |
| 1972 | 1151859 (61.2) | 24 (2) | 20.8 (1.7) |
| 1973 | 1355211 (70.9) | 28 (14) | 20.6 (10.3) |
Source: Yamaguchi et al. [4].
a
Number in parentheses indicates % performed, according to the Ministry of Health and Welfare.