Case analysis: A woman took 6 weeks to recover from COVID19 mild-strong symptoms suffered from dry cough, slight fever and dyspnea (pain in the lung when she coughs), after 3 weeks of recovery ''she believed she has immunity'', she get infected again.
Her 2 roommates, both, showed loss of smell and /or test sense, and frequent fever with strong body weakness and no cough, this time she started showing same symptoms as her roommates...I'm wondering if cornoa virus that favor to colonize the upper nasal part is of different clone from the one colonize airway and lung tissue, and immunity against one doesn't protect from the other??