Thread by @sumanthraman

We speak about doctors and frontline workers who tested positive.What we aren't realizing is that the majority of them haven't had the illness. Maybe some were undetected but at any rate most haven't been very sick. To attribute this entirely to masks & PPE

seems naive. There are doctors I hv spoken to who say they have been exposed multiple times when masks slipped or when they dealt with patients they didn't know were positive.Some have even had #covid patients cough on their face. They didn't get the infection despite exposure

to high viral loads.Those working in hospitals are the ones exposed to the highest viral loads and most haven't had severe disease. Clearly there is something that renders many people immune to the infection even if they have never had it before.

Finding what this is may be the key to unlocking the #Covid puzzle. We need to look for patterns in those exposed and yet not infected. Right now the studies are focused on finding patterns in those who tested positive and had the illness.

We need a study on doctors and nurses working in COVID wards who remain healthy. Analyse their genetic, enzymatic patterns. What common traits do they have? @EricTopol are there any studies on this being done? @VincentRK @ScottGottliebMD