claim: antibodies in serum of convalescent patients following mild covid-19 do only always prevent virus receptor binding
evidence_1: [protective effect of specific antibody in serum of convalescent patient with sars].", "the scientists from meduni vienna's institute of pathophysiology and allergy research discovered that only around 60% of patients who have had covid-19 and recovered from it develop protective antibodies and, for the first time, they were able to show that some antibodies even \"assist\" the virus by augmenting its to the cells of the host.")