3 ms·
Right. Blood from 3-4 years ago has antibodies. One interpretation could be that those people were never exposed but somehow have antibodies which needs investi
by mberning 6y ago
Right. Blood from 3-4 years ago has antibodies. One interpretation could be that those people were never exposed but somehow have antibodies which needs investigation. Another interpretation could be that covid-19 is a particularly bad seasonal strain of a disease that has been around for a long time. We probably will never know. People are still studying SARS and MERS.