Measles immunisation of nine-month-old Thai children has been part of the national health programme since 1984. In this study we compared the seroconversion rate following measles immunisation in nine-month-old Thai children with the older age groups, i.e. 10 to 14 months of age, to see whether revaccination at over 12 months of age is necessary. In 223 children, 204 had no measles haemagglutination inhibition antibody before measles vaccination. The seroconversion rates in children aged nine to ten, 11 to 12, and 13 to 14 months were 96.1%, 94.5% and 100% respectively with no difference statistically.
1. Division of Epidemiology, Annual Surveillance Summary.Thailand: Ministry of Public Health, 1982.
2.
2. Pongrithsukda V, Phonboon K, Manunpichu K: Measles-associated diarrhea in northeastern Thailand.Southeast Asian J Trop Med Pub Hlth1986;17:43.
3.
3. Chotpitayasunondh T, Thisyakorn U, Ningsanond V, Mansuwan P: Measles in children's hospital, Bangkok.J Pediatr Soc Thai1982;21:51–62.
4.
4. Yeager AS, Davis LH, Ross LA: Measles immunization successes and failures.JAMA1977;27:347.
5.
5. Krugman RD, Rosenberg R, Mcintosh et al: Further attenuated live measles vaccines: the need for revised recommendations.J Pediatr1977;91:766–7.
6.
6. Ueda S, Okuno Y, Sangkawibha N et al: Studies on measles in Thailand. Seroepidemiological examination.Biken1967;10:129–33.
7.
7. Vanprapar N, Chavalittamrong B, Chearskul S, Pimolpan V: Disappearance of measles antibody in Thai infants after birth.Southeast Asian J Trop Med Pub Hlth1983;14:488–90.
8.
8. Lolekha L, Phirom N, Isaraprasart S, Patarakijvanich N, Jayavasu C, Chatiyanonda K: Measles immunization in Thai children.Ramathibodi Med J1982;5:245–52.
9.
9. Lennette E, Schmidt N: Diagnostic Procedures for Viral, Rickettsial and Chlamydial Infections.Washington DC: American Public Health Association, 1979.
10.
10. Krugman S, Giles J, Friedman H et al: Studies on immunity to measles.J Pediatr1965;66:471–88.
11.
11. Anonymous: Severity of measles in malnutrition. Nutr Rev1982;40:203–5.
12.
12. Halsey NA: The optimal age for administering measles vaccine in developing countries. In: Halsey NA, de Quadros CA, eds. Recent Advances in Immunization: A Bibliographic Review.Washington DC: Pan American Health Organization, 1983, pp 4–17.
13.
13. WHO: Expanded programme of immunization: indications and contraindications for vaccines used in the EPI.Wkly Epidem Rec1984;59:13–5.
