Q: I live in a large Manhattan apartment building and I’m increasingly worried about the risk of contracting coronavirus in the lobby and other common areas. What should my building be doing to keep residents safe?

A: With a rising number of confirmed coronavirus cases in the New York City area, and about 100,000 worldwide, people are understandably anxious about how to protect the spaces they move in, be they subways, office cubicles or apartment buildings.

Coronavirus guidelines published by the Centers for Disease Control and Prevention “are based on evidence that the virus is transmitted primarily through respiratory droplets — the large, sometimes visible droplets expelled when someone coughs or sneezes,” Joseph G. Allen, the director of the Healthy Buildings program at Harvard T.H. Chan School of Public Health, wrote in

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The Times on Wednesday. “Thus the recommendation to cover your coughs and sneezes, wash your hands, clean surfaces and maintain social distancing.”

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