Petrescu A, Broniţki A L, Teodosiu O, Mihail A, Popescu A, Cojiţă M, Petrişor L, Ialomiţeanu M, Mîşcă C, Sferdean O, Botgros V, Michel P, Birţ E, Simionescu A L, Doicescu M, Diaconu A L, Surianu G
Virologie. 1976 Apr-Jun;27(2):111-4.
The virological study of some influenza outbreaks recorded in Romania in the period Jnauary--March 1975 resulted in the isolation of 29 influenza A2 virus strains antigenically close to the strains A2/Port Chalmers 1/73 and A2/England 42/72. The non-homogeneous antigenic structure of the isolates suggests the possible formation of natural hybrids.