Your immune system protects against millions of diseases, but does it continuously produce antibodies for all of them? Of course not. This means that testing po

Your immune system protects against millions of diseases, but does it continuously produce antibodies for all of them? Of course not. This means that testing positive for covid19 antibodies is strong evidence that person has been infected with covid19, but the inverse is not true. That's why we don't do antibody tests for the seasonal flu: there's just no point. Depends on what you mean by "over". Covid19 is trending down in the northern hemisphere and it will continue to trend down even after all countries stop with their ineffective lockdown measures, but the virus won't disappear completely. But life can go back to normal, except people should be a little more careful about washing their hands and not visit the elderly if they feel sick. But handwashing and consideration for the health of the vulnerable should be the default anyway, and we should do that regardless of covid.