LONG covid? COVID Pneumonia?

Just buried my Sister in Law from complications of long term Covid.
She got it over a year ago, never really got over it. Got it again 2 months ago this time it took her. The Doctors told my brother their was nothing they could do.
70 year old retired school teacher.
My Extreme Condolences Sir... Man that Sucks I'm sorry for Y'alls loss...