[gitonup]

I've seen this cited several times in this thread, but I've seen no one mention that (according their own FAQ):

> medRxiv (pronounced "med-archive") is a free online archive and distribution server for complete but unpublished manuscripts (preprints) in the medical, clinical, and related health sciences. Preprints are preliminary reports of work that have not been certified by peer review. They should not be relied on to guide clinical practice or health-related behavior and should not be reported in news media as established information.

The context is important, even if it turns out to be true.

[cblconfederate]

Indeed the final version has not been published yet, but there are no major reasons to doubt its validity. Here's an evaluation of the preprint from Johns Hopkins: https://ncrc.jhsph.edu/research/comparing-sars-cov-2-natural...