Analysis of measles data of the Northern region in 2000 indicated that the disease spread widely in all provinces and all the year round. However, it mostly occurred in spring, and in this season measles outbreaks were also often recorded, 36 out of 48 measles outbreaks were confirmed by serological diagnosis. Most of the measles cases were recorded in age group 5-15 years old. Most of the measles cases in immunized children were in the age group 5-9 years. The results: the confirmed measles cases appeared in big cities, delta provinces as well as in midland and mountainous provinces. There was no significant difference regarding sex. The symptoms usually observed in the measles cases were fever, cough, coryza, rash and conjunctivitis
Measles ; Measles Vaccine

The rate of polio vaccine immunization coverage of children aged under 5 in National Immunization Days in Northern Region of Vietnam in November and December in 1997 reached 99.3%.
Poliovirus Vaccine, Inactivated ; immunization ; child

The rate of immunization was high and maintained continuously 11 years in the Northern Region. Evident, efficacy is the decreasing of incidence of EPI diseases, especially poliomyelitis, neonatal tetanus, and diphtheria. During continuous 8 years (from 1994 to 2001), there has been no wild poliovirus in the Northern Region, and the Region was certificated as polio-free in 2000. Neonatal tetanus has also been eliminated at the provincial level since 1995 and at district level since 1999. The other EPI diseases have been considerably reduced
Epidemiology ; immunization ; poliomyelitis ; Tetanus ; Diphtheria