A World Health Organization (WHO) panel today strongly advised against using hydroxychloroquine to prevent COVID-19, as the COVAX program gained more steam with vaccine doses arriving in Colombia and countries learning of their allocations.In other developments, the WHO in its weekly situation report had more details about the recent rises in cases, which reversed a 6-week decline.Hydroxy review finds no preventive effectA WHO expert panel that reviewed hydroxychloroquine as a COVID-19 preventive based their firm conclusion on a review of six randomized controlled trials that included more than 6,000 participants who did and didn't have exposure to someone infected with the virus.