Covid-19: Should doctors recommend treatments and vaccines when full data are not publicly available?

With knowledge of covid-19 less than a year old, treatment remains fraught with uncertainty. Preprint data and adaptive clinical trials are imperfect but can guide active decision making in life-or-death situations, says Raymond M Johnson. But Peter Doshi and David Healy argue that doctors and professional societies should state that, without complete data transparency, they will not endorse covid-19 products as being based on science