Surveillance of influenza in Tananarive. 1989

: The authors report results of epidemiological survey of influenza in TANANARIVE. This survey is based on respiratory morbidity observed in an interprofessional health center, and virus isolation. Two viruses have circulated in 1989: B virus (B/VICTORIA/2/87) during first half-year, and A: A/VICTORIA/36/88 (H1N1) virus during dry season with a pick in November. Influenzae has been responsible of grouped sporadic cases without epidemic diffusion.