Do you know how academic, narrow and unpractically stiff are criteria for a proof of reinfection? You need to have the viral genome sequenced TWO times, and bot

Do you know how academic, narrow and unpractically stiff are criteria for a proof of reinfection? You need to have the viral genome sequenced TWO times, and both times it must be a slightly DIFFERENT virus. In that context "very rare" is not a useful term.