Positive Covid-19 antigen tests with Norwegian blood samples from 2019
It seems to me that the death rate and transmissability of the wuhan strain of covid means it is unlikely it was around in other countries prior to its discovery in china, the deaths would have been noticed. Is it more likely that a less lethal strain was circulating, a few people developed antibodies, then it mutated in wuhan to become the more deadly version?.<p>This would explain early antibodies, the lack of corresponding deaths in europe,but we also know how easy this thing mutates now.