Peter Dario, who had diabetes and was on dialysis, started to look sick at the beginning of March, said his daughter Marsha Dario, 32, a nurse. His 86-year-old mother-in-law, who also lives in the household, was already sick with Covid-like symptoms.

When Marsha Dario picked her father up from dialysis on March 7, he was weak, dizzy and vomiting. She told him he needed to go to the hospital. But he refused.

His condition worsened. Struggling to breathe a few days later, he finally agreed to go to the hospital — but only if his wife, Luzviminda Dario, 63, came too. Although his wife was sick by then as well, she went. “They were inseparable,” said Peter John Dario, his son, who is 23.

The day after he was admitted to John F. Kennedy Medical Center, Peter Dario lay unconscious, intubated and on a ventilator. Three days later, on the night of March 19, the hospital called the family to say his fever had spiked and he was unstable. Finally, a nurse said one family member would be allowed in. The previous day, Luzviminda and Marsha Dario had received positive test results for the coronavirus and were in quarantine at home, so Peter John Dario rushed to the hospital. While he was being screened at the entrance for the symptoms of coronavirus infection, his father died.

Just as difficult is the prohibition of visits with patients who have other grave illnesses or are undergoing risky surgery.

This month, Brittany Sanchez, 32, was at home in Las Vegas getting her two small children ready for bed when she had a seizure and collapsed.