[Influenza. Sero-epidemiological supervision of the Alitalia airline personnel (1978-1979)]

From the autumn 1978 to the spring 1979 an epidemiological inquiry was set up concerning samplings of sera of 1648 adult of different ages and of both sexes. It was noticed a contemporaneous presence of A/Texas/1/77(H3N2) and A/USSR/90/77(H1N1) viruses; it was found a larger frequency of the last subtype in the individuals born after 1957. During the winter 1978/1979 it was also noticed an overlap of B influenza virus.