> What is paper is saying is that previous exposure to coronavirus (the common cold) grants some level of immunity to covid19. It's not saying that. The presen

> What is paper is saying is that previous exposure to coronavirus (the common cold) grants some level of immunity to covid19. It's not saying that. The presence of these antibodies does not necessarily mean any level of immunity against SARS-CoV-2, which is a different virus than the one that triggered these antibodies. The degree to which these antibodies contribute towards immunity against the new virus is unknown, and wasn't evaluated by this study.