title: [Influenza in Umbria from September 1977 to May 1978].
abstract: From September 1977 through May 1978 a research project was conducted to determine the presence of Haemagglutination Inhibiting Antibodies (H.I.A.) on three influenza viruses: A/Victoria/3/75, A/URSS/90/77 and B/Hong Kong/8/73. Participating in the project were 1066 persons residing in the region of Umbria, Italy, ages ranging from 0- - 60. The results obtained showed the possibility of diffusion in Umbria of all three of the strains studied due to the low protective levels found in the participating subjects. In fact, the protective levels (> 1:40) are present only in a small percentage of subjects (31% protected against A/Victoria/3/75; 1% protected against A/URSS/90/77 and 10% protected against B/Honk Kong/8/73). An influenza strain of type A, related to A/URSS/90/77 was isolated in Perugia (Umbria) in March of 1978.
mesh_terms: D000293:Adolescent; D000328:Adult; D000914:Antibodies, Viral; D002648:Child; D002675:Child, Preschool; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D009980:Influenza A virus / Q000276:immunology*; D007251:Influenza, Human / Q000453:epidemiology* / Q000276:immunology; D007558:Italy; D008875:Middle Aged
chemical_list: D000914:Antibodies, Viral
vernacular_title: Indagini sulla influenza in Umbria nel periods Settembre 1977 - Maggio 1978.