It sounds like Prine died of Covid Hospital Protocol
On March 19, 2020, amid the COVID-19 pandemic in the United States, Prine's wife Fiona revealed that she had tested positive for SARS-CoV-2 and had been quarantined in their home apart from him.[52] He was hospitalized on March 26 after experiencing COVID-19 symptoms.[53] On March 30, Fiona tweeted that she had recovered and that John was in stable condition but not improving.[54][55][56] Prine died on April 7, 2020, of complications caused by COVID-19 at the age of 73.
https://en.wikipedia.org/wiki/John_Prine