Some diseases have 2 phases (biphasic), so you get sick, recover somewhat, get sick again, often with different symptoms. I've read in the press that corona vi

Some diseases have 2 phases (biphasic), so you get sick, recover somewhat, get sick again, often with different symptoms. I've read in the press that corona virus might be biphasic, which is a big problem for an air-borne transmissable disease. In the jet age, quarantining potentially thousands or millions of passengers becomes expensive and disruptive when there's a week between phases. Lyme disease is like that. First you get a bullseye rash and flu-like symtoms, it goes away, then later your organs are attacked. https://en.wikipedia.org/wiki/Biphasic_disease https://en.wikipedia.org/wiki/Biphasic_disease That's different than a chronic disease, where you never recover.