INFORMATIVE SEROLOGICAL STUDY OF THE INCIDENCE OF ARBO VIRUS INFECTIONS IN CZECHOSLOVAKIA.
D001102:Arbovirus Infections; D003604:Czechoslovakia; D004813:Epidemiology; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D015994:Incidence; D014777:Virus Diseases
ARBOVIRUS INFECTIONS; CZECHOSLOVAKIA; EPIDEMIOLOGY; HEMAGGLUTINATION INHIBITION TESTS