Patients over equal or older than 65 yearswill be treated with a hydroxychloroquine versus
placebo reduced loading dose of 600mg on the first day followed with 400mg/day divided in
2x200mg for 6 more days resulting in a total duration of therapy of 7 days. Measurement of
Hydroxychloroquine-levels will be performed on day 7, . A follow-up by video or telephone
conference will be performed to observe drug intake and collect adverse events during
treatment phase on a daily base on working days and once during the weekend (i.e. 6 out of 7
days). After treatment phase follow-up by telephone calls will be done on day 10, 30, 60 (+/-
2 days).