When I was a young boy, summer came with the happy prospect of a vacation to my hometown, but also with warnings of fevers and poxes. Villages in Tamil Nadu, then and even today, are dotted with shrines to goddesses of pestilence, who are garlanded with neem leaves and offered oblations of turmeric paste wash, believed to have antiseptic properties to ward off diseases. It was not unknown for local elders and community heads to shut down their borders when a rash of pox afflicted their villages. Visitors who brought a “fever” and spread it to the population from their travels outside were punished; and containment helped to arrest the spread of pestilences to other villages.