They knew & they know now but they keep pushing the lie.....
@Bereonb2020 I heard a female doctor speaking out on this a couple months back...all she did at first was to post the real scientific study that showed Fauci+ knew that many of the death during the “Spanish Flu” were caused by bacterial (not a virus) pneumonia. She then started to connect the dots from there...FB made her take it all down...praying people hear the truth & open their eyes even with all the censorship.
Bereonb2020 well if the goal is depopulation, the mask is a good tool for Fauci and Gates