MCQs in Tropical Medicine

Rob Skelly DTM+H FRCP

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Periods of infectivity:

F T F T T

Chicken pox: 5 days before rash to six days after last crop.

Mumps: 3 days before until 7 days after salivary swelling.

Whooping cough: 1 week after exposure to 3 weeks after onset of symptoms. The period of infectivity may be shortened by antibiotics.