The United Kingdom is trialling two anti-malarial drugs on healthcare workers to assess if they could help in the fight against Covid-19. Drugs including chloroquine and hydroxychloroquine will be administered to about 40,000 workers in hospitals in Brighton and Oxford for three months. There is no scientific evidence yet to affirm that these drugs could help prevent the Covid-19 infection but several countries are prescribing them. The UK trial is part of a project by Bangkok-based Mahidol Oxford Tropical Medicine Research Unit. The results are expected by the end of the year.