We studied the effect of influenza virus hemagglutinin on the volume of ery
throcytes and aggregation activity of thrombocytes. Hemagglutinin proved to
increase the erythrocyte volume, which ends in their lysis, and to induce
disaggregation of the thrombocytes. The effect of hemagglutinin on the eryt
hrocytes and thrombocytes was dose-dependent.