Respiratory viruses in Jamaica: a virological and serological study. 2. Hemagglutination-inhibiting antibodies to influenza A viruses in the sera of Jamaicans

ABSTRACT

The incidence and level of hemagglutination-inhibiting antibodies to 4 group A infleunza viruses in the population of Jamaica has shown that there is an approximately similar age distribution of antibodies to the different infleunza strains as has been encountered else-where. Antibody titres to A/Swine/1976/31 were highest in sera from older Jamaicans; antibodies titres to A1/Fort Manmouth/1/47 were maximal in the younger segment of the population and antibody titres to A/Puerto Rico/8/34 reached their highest levels in sera from intermediate age groups. The greatest incidences and levels of hemagluttination-inhibiting antibody in almost all age groups were observed against infleunza A2/Jamaica/2/63, a locally recovered type A2 strain.(Summary)