| Date | Incidence | Government comments |
| 19/9/1989 | 1/100,000-200,000 | safe |
| 25/10/1989 | 1/30,000 | use carefully |
| 20/12/1989 | 1/a few thousand | only if parents want |
| 31/05/1991 | 1/1200 | need parent's consent |
| 30/4/1993 | MMR shots cease |
Naples Conference--"Compulsory Vaccination" (may 1997) from the speech of Hidehiko Yamamoto, Japanese Paediatrician (AVN Measles vaccination booklet)