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Kullar said. Kullar, also a member of the Infectious Disease Society of America (IDSA), explained patients who recoverfrom the novel coronavirus can shed viral fragments for weeks, giving some tests a positive result even though the virus is no longer live. But the 33-year-old mans case is a different scenario, Kullar noted. This report sequenced the virus from both rounds of infection and found differences in both sets of the virus, showing that the patient may have been infected a second time. This may support the finding that some patients [who]get infected with COVID-19 have diminishing antibody levels after just a few months.