A week ago I had a heart attack (my 2nd; 1st was 2006), got a helicopter ride to Morristown, and in the cath lab after I was stented I asked a tech about differentiating Covid-19 disease from viral pneumonias generally. He said that radiologically Covid-19 looked very different from any pneumonias; something about where fluid would accumulate that made it different from either pneumonia or pleurisy.
Everything else I see, though, says it's a type of pneumonia, and from what I can tell, Covid-19 is being presumed to be the cause of all viral pneumonias now. There's an incentive in terms of Medicare payment for them to presume so.
A friend's living in a county in NE Penna. that's had 2 Covid-2 fatalities. One of them was the friend's exterminator's friend, 81 YO with multiple medical problems. He fell down the stairs and broke his neck. They tested his corpse, found Covid-19 RNA sequences, and called it a Covid-19 death, notwithstanding that he'd had no respiratory signs or symptoms.