Prophylaxis: Chloroquine or hydroxychloroquine prevention of COVID-19 disease for caregivers in L...

The aim of this clinical trial is to determine if prophylactic chloroquine or hydroxychloroquine prevents symptomatic COVID-19 illness health care workers in Luxembourg. The secondary objectives include: • Attenuation of the clinical severity of COVID-19 infections. • The prevention of asymptomatic COVID-19. • The prevention of symptomatic all-cause acute respiratory illnesses (ARI).