The incidence of HBsAg in several areas of Romania was studied by 253,460 routine determinations performed from 1973 to 1975. HBsAg incidence was of 1.5% in blood donors and reached the highest value in acute viral hepatitis patients undifferentiated according to the clinical form. The values obtained were in agreement with the results of other studies covering more limited zones of the country. Considerable differences in HBsAg incidence depending on geographic area were observed.

Adult↗

PubMedDate not supplied

[Use of a mathematical model on the evolution of morbidity of certain viral diseases for characterization of the epidemiology of influenza in the People's Republic of Rumania. Note II. Analysis of the epidemiology of influenza in a geographical region with high morbidity].

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Age Factors↗

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Virological study of some influenza outbreaks in the period January--March 1975.

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.

Antigens, Viral↗