Table 1. Critical values (cases per week per sentinel medical institution) for issuing (onset) and ending epidemic warnings, and issuing pre-epidemic warning in infectious disease surveillance in Japan.
| Diseases | Warning | Pre-epidemic warning |
|
|
| |||
| onset | end | ||
| Influenza-like illness | 30 | 10 | 10 |
| Pharyngoconjunctival fever | 1 | 0.1 | — |
| Group A streptococcal pharyngitis | 4 | 2 | — |
| Infectious gastroenteritis | 20 | 12 | — |
| Chickenpox | 7 | 4 | 4 |
| Hand-foot-mouth disease | 5 | 2 | — |
| Erythema infectiosum | 2 | 1 | — |
| Exanthema subtium | 4 | 2 | — |
| Pertussis | 1 | 0.1 | — |
| Rubella | 3 | 1 | 1 |
| Herpangina | 6 | 2 | — |
| Measles | 1.5 | 0.5 | 0.5 |
| Mumps | 5 | 2 | 3 |
The numbers in the table are cases per week per sentinel medical institution.