Challenge trials face resistance for very valid historical reasons—this podcast has a good summary. https://80000hours.org/podcast/episodes/marc-lipsitch-winning-or-losing-against-covid19-and-epidemiology/
Challenge trials face resistance for very valid historical reasons—this podcast has a good summary. https://80000hours.org/podcast/episodes/marc-lipsitch-winning-or-losing-against-covid19-and-epidemiology/