[Protective action of remantadine during an influenza outbreak caused by virus A (H1N1) in December 1977].

The protective effect of remantadin during an influenza outbreak in December 1977 caused by A (H1N1) virus was studied. A prophylactic administration of remantadin decreased influenza and ARD incidence by 1.5-fold.

[Immune structure of the population of Moscow to the strains of the influenza viruses A(H3N2), A(H1N1) and B circulating in 1977].

Examinations for the presence of antihemagglutinins to influenza A(H3N2), A(H1N1) and B virus strains in the sera from people of different ages collected in April-May and October-November, 1977, showed that influenza A(H1N1) virus began to circulate in the human population of Moscow before the onset of an overt epidemic, in the period between June and October, 1977. This conclusion has been drawn on the basis of the absence of antihemagglutinins to A(H1N1) virus in the sera from subjects of 16-20 years late in April and their detection in 25.9% of those examined on November 23, 1977.