claim: the race is on for pathogens that stop the new coronavirus
evidence_1: one modification slows the antibody degradation to give it a longer effective life; another improves the so-called vaccinal effect, which summons t cellsanother arm of the immune systemto help destroy infected cells.", "many researchers are optimistic that antibodies will, relatively quickly, prove their worth as a preventive or remedy that buys the world time until a vaccine arrivesif it does.")