In order to understand the measles immune status of the population in Huadong District (including Jiangsu, Zhejiang, Jiangxi, Anhui, Fujian, Shandong Provinces and Shanghai city) , we selected a total of 3,483 persons of different age groups (2-4, 5-8, 9-12, 13-18, 19-29 years old) in 1998-1999 from one city and one country of each of the province and from one residential district and one country of shanghai city. The blood specimens were assayed by HI test following an unified procedure. The results showed that: (1) Measles HI antibody positive rate in 3,483 persons in Huadong District was 92.10%, the GMT was 1∶12.24; (2) Measles HI antibody positive rates in 6 provinces and 1 city ranged from 87.95%～98.92,the GMT from 1∶7.67～1∶28.05, but differences in different age groups of different provinces and1 city existed; (3) Measles HI antibody positive rates in different age groups in 6 provinces and?1 city rated from 89.11%～94.90%, but differences were seen in the same age groups of different provinces; (4) Measles HI antibody positive rates in city population ranged from 88.30%～97.89% while that was 86.52%～100% in country population; (5) Measles HI antibody positive rates in various age groups of cities and countries were about 90%, but differences existed in different provinces. Based on these investigations, we hold that in Huadong District measles prophylactic work has built up a nice immune foundation, measles epidemic possibly may not occur in recent years, but still we should pay attention to local outbreaks in same other places.
Chinese Journal of Vaccines and Immunization