Geographic and seasonal differences in bacteriologic and serologic observations as related to hemolytic streptococci in "open" and "closed" groups of children.
D002648:Child; D005843:Geography; D006801:Humans; D012621:Seasons; D013290:Streptococcal Infections; D013291:Streptococcus; D014887:Weather
GEOGRAPHY; STREPTOCOCCAL INFECTIONS; WEATHER