Serological studies on swine influenza in Egypt

480 pig serum samples collected from November 1979-October 1980 and 200 human sera collected in the same period, nearly have been used in serological investigations. 52.5% sera were positive against swine influenza (HSW1N1) 10% only of human sera were positive against (HSW1N1) virus. By using (H3N2) human virus, 10.4% of pig sera were positive, while 41% of human sera were positive against this virus.