* retinal degeneration. * congenital or acquired long qt syndrome. * advanced liver failure. * renal insufficiency (incompatible with creatinine clearance less than 50 ml /minute). * allergic to hydroxychloroquine or azithromycin. * serious interaction with the drugs used. * pregnant or breastfeeding. * men and women in fertile and sexually active periods, who do not accept a highly effective contraceptive method. * inability to follow study procedures.

* retinal degeneration. * congenital or acquired long qt syndrome. * advanced liver failure. * renal insufficiency (incompatible with creatinine clearance less than 50 ml /minute). * allergic to hydroxychloroquine or azithromycin. * serious interaction with the drugs used. * pregnant or breastfeeding. * men and women in fertile and sexually active periods, who do not accept a highly effective contraceptive method. * inability to follow study procedures.

- retinal degeneration. - congenital or acquired long qt syndrome. - advanced liver failure. - renal insufficiency (incompatible with creatinine clearance less than 50 ml /minute). - allergic to hydroxychloroquine or azithromycin. - serious interaction with the drugs used. - pregnant or breastfeeding. - men and women in fertile and sexually active periods, who do not accept a highly effective contraceptive method. - inability to follow study procedures.

- retinal degeneration. - congenital or acquired long qt syndrome. - advanced liver failure. - renal insufficiency (incompatible with creatinine clearance less than 50 ml /minute). - allergic to hydroxychloroquine or azithromycin. - serious interaction with the drugs used. - pregnant or breastfeeding. - men and women in fertile and sexually active periods, who do not accept a highly effective contraceptive method. - inability to follow study procedures.