Well that's disappointing, although not definitive. Another study gave a slightly rosier picture but had no control arm, so it isn't all that useful https://w

Well that's disappointing, although not definitive. Another study gave a slightly rosier picture but had no control arm, so it isn't all that useful https://www.nejm.org/doi/full/10.1056/NEJMoa2007016 https://www.nejm.org/doi/full/10.1056/NEJMoa2007016 The Chinese study was apparently stopped early due to declining cases and difficulty of enrolling new participants.