2 September 2020 World Covid-19 Antibodies Present In Patients Four Months After Recovery: Study An editorial that accompanied the study cautioned that it is unclear if recovered patients' antibodies will protect them from reinfection.
21 April 2020 Malaysia MOH Warns Recovered People May Not Be Immune To Covid-19 The Health DG also said there were conflicting reports on whether asymptomatic people were contagious.