Picky people, nosey germs.
D003428:Cross Infection / Q000382:microbiology; D006184:Habits; D006801:Humans; D009666:Nose / Q000382:microbiology*; D013203:Staphylococcal Infections / Q000382:microbiology*; D013211:Staphylococcus aureus / Q000302:isolation & purification