[EPIDEMIOLOGICAL OBSERVATIONS ON THE INFECTION OF HOSPITALIZED  CHILDREN WITH GROUP A STREPTOCOCCI].
D002648:Child; D002673:Child, Hospitalized; D003428:Cross Infection; D004813:Epidemiology; D006801:Humans; D011044:Poland; D013290:Streptococcal Infections
CHILD; CROSS INFECTION; EPIDEMIOLOGY; POLAND; STREPTOCOCCAL INFECTIONS