Public health ... a little bit of penicillin could quickly banish bacteria.
D003428:Cross Infection / Q000453:epidemiology; D003625:Data Collection; D006801:Humans; D007755:Laboratories, Hospital; D010403:Penicillin Resistance; D013296:Streptococcus pneumoniae / Q000187:drug effects*; D014481:United States / Q000453:epidemiology