[Epidemiological study on the effects of influenza virus vaccines--based on the state of absence examined in elementary school children as a whole and in children with a history of disease].
The effects of commercially available HA influenza vaccines, produced in 1988, was investigated in pupils in elementary schools located in six cities in Saitama Prefecture during the prevalence of influenza from 1988 to 1989. The state of absence in the children as a whole and in those with a history of disease was examined statistically, by dividing them into three groups in terms of the number of vaccinations given. The following results were obtained. 1) The proportion of children who had received no vaccination (71.2%) was significantly higher than that of children who had received one (9.6%) or two (19.3%) vaccinations. 2) A history of disease was found in 1,048 (3.3%) of the 31,941 children. The percentage of children having such a history was 3.6%, 2.7% and 2.5% among those who had received 0, 1 and 2 vaccinations, respectively; those who had no such history accounted for more than 96.0% in each group of children. 3) There were no differences between the three groups of children with regard to the proportion of those who had a history of respiratory or circulatory symptoms. 4) The rate of absenteeism and the overall rate of absenteeism were found to be significantly higher in children without any vaccination than those with two vaccinations, regardless of whether all subjects were considered or only those who had a history of disease were considered. 5) Both among all subjects and among those who had a history of disease, the mean number of days of absence was significantly high in children without any vaccination than those with 2 vaccinations.(ABSTRACT TRUNCATED AT 250 WORDS)
Satsuta
K
K
Department of Hygiene and Public Health, Nippon Medical School.
D000041:Absenteeism; D016009:Chi-Square Distribution; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control*; D007564:Japan / Q000453:epidemiology; D008487:Medical History Taking; D012574:Schools
D007252:Influenza Vaccines