Some remarks on measles outbreaks in the Northern Region of Vietnam, 2001

ABSTRACT

In 2001, there were 37 outbreaks of measles with various sizes in the Northern region. 36 out of 37 outbreaks were confirmed by MAC-ELISA. Percentage of positive sera was 86.3%. The measles outbreaks became more seriously in mountainous areas. The measles cases occurred all the year, and focused on January to May, with the peaks were January and February. The distribution of measles by age group has changed to group of older children, with most of cases were in 5-15 age group. 64.5% of measles cases were not immunization. The ratio of non-immunization to immunization increased with age group