Nearly a month after he became the first Queens resident to test positive for the virus, Mr. Darhan not only feels he cannot touch his children, but he has lost his job as an Uber driver and has no idea what is next, or how long he can pay his monthly bills. “I’m worried,” he said.

Like Mr. Darhan, many survivors say they are starting to realize the ramifications of surviving the illness, from lost work to severe anxiety.

The latest guidance from the Centers for Disease Control and Prevention says that people recovering from the virus no longer need to isolate themselves if they have had no fever for six days without taking medicine. But the advice has been changing as the authorities learn more about the outbreak, and Mr. Darhan, traumatized by his experience, is leaving nothing to chance.

His wife and their children — Ali, HaDeel and Sara — sleep in one of the two bedrooms in their apartment, he said. He is in the other. When awake, he stays at least six feet away during meals and anytime he shares a room with them.

Mr. Darhan, an immigrant from Yemen, said he longed to play with his children, or to sit close together and watch television. But he cannot escape the fear that remnants of the virus are lingering in his body. So, he talks to them over FaceTime from a different room or several feet apart.