“Really, I felt that I was going to die, my man,” Barbosa said. “I was having a crazy fever. My head was extremely bad. My nose felt like it was closed, but it wasn’t closed. I was feeling a lot of pain in my back — I couldn’t find a position to lay down.”

Barbosa added: “I had fever before. I had pain in my head before. I had pain in my whole body when I was sick, but nothing similar to that. Whatever I get, I always fight through. That’s just something I learned when I got to the N.B.A. But that night was something; it was tough to fight. Because it was different.”

Adding to the stress, Barbosa said, was the refusal of the team’s medical staff to treat him at his home in fear of contracting the virus. Barbosa credited the family’s driver, Fabiano da Silva, for nursing him through the first night and driving him six hours from Belo Horizonte to São Paulo after it was confirmed he had the virus and air travel was no longer possible.

After concerns about her own breathing and platelet count during delivery, Rocca had to wait until the day after birth before she was allowed to take Isabela in her arms. Barbosa was instructed to isolate for two weeks once he arrived in São Paulo, but his brother Marcelo insisted that Leandro stay with him. The brothers are close after they spent considerable time together in the United States during Leandro’s N.B.A. career.

“He wouldn’t let me be alone,” Leandro Barbosa said. “I said, ‘What if you get it?’ He said: ‘I don’t care. Then we’ll both have it.’”

He added: “Talita’s mother didn’t get the corona. My brother didn’t get the corona. My driver didn’t get the corona. Just me and my wife, man. Can you believe that?”