Lex, I think the position of any head of any institution on health/research in a time of pandemic is not to muddle the message and put out a clear policy EVEN if it is wrong.  Collins and Fauci surely have doubts, and at that time, really had very insufficient evidence to claim anything. Their emails or public messages I think were meant to remind those in the medical profession to NOT present opposing evidence/arguments publicly as not to muddle the message.  They may sound arrogant but that's a subjective perspective. Others in the medical profession with different ideas could have certainly agreed with their approach.,(reply>), 👆👆📩