It means that people that have the at least one common antibody from exposure to the common cold as those that have had COVID-19. The implication (in the best

It means that people that have the at least one common antibody from exposure to the common cold as those that have had COVID-19. The implication (in the best of all possible worlds) is that the antibodies that fight common cold also fight COVID-19. Or it could be a simple correlation and not significant.