[istorical]

> We don't know of any immune system interactions that don't work that way.

Unfortunately not the case. https://en.wikipedia.org/wiki/Antibody-dependent_enhancement

But the good news is that we don't have any knowledge of coronaviruses that get worse the second time around because of ADE.

[dmurray]

Isn't that a case of having multiple strains of the virus, where recovering from one strain still provides immunity to that strain? The gimmick here is that it decreases resistance to the other strain, possibly after some time.