If he was collecting medicine for her, then that probably killed her, or the disease that required the medicine. It wouldn't be the virus, although many people try to blame all deaths on the virus
The husband was a taxi driver or something, there are evidences that the man contacted the disease first, later spread it to his wife. The main was healthy before the disease and was healed. But the wife had pneumonia, as well know such disease (pneumonia) likely can make covid-19 to have its way until the victim is dead.