inclusion criteria: * positivesars-cov-2 rt-pcr in hospitalized patients in university hospital farhat hached in sousse tunisia. * had either not received hydroxychloroquine before or had received hydroxychloroquine for at least 1 day and could tolerate a dose of 200 mg of hydroxychloroquine/day.

inclusion criteria: * positivesars-cov-2 rt-pcr in hospitalized patients in university hospital farhat hached in sousse tunisia. * had either not received hydroxychloroquine before or had received hydroxychloroquine for at least 1 day and could tolerate a dose of 200 mg of hydroxychloroquine/day.

inclusion criteria: - positivesars-cov-2 rt-pcr in hospitalized patients in university hospital farhat hached in sousse tunisia. - had either not received hydroxychloroquine before or had received hydroxychloroquine for at least 1 day and could tolerate a dose of 200 mg of hydroxychloroquine/day.

inclusion criteria: - positivesars-cov-2 rt-pcr in hospitalized patients in university hospital farhat hached in sousse tunisia. - had either not received hydroxychloroquine before or had received hydroxychloroquine for at least 1 day and could tolerate a dose of 200 mg of hydroxychloroquine/day.