So we have four estimates here.
1) The CDC estimates that influenza has a 0.1% mortality rate.
2) The CDC estimates that Covid-19 has a 1% mortality rate.
3) Teflon estimates that influenza has a 9.9% mortality rate.
4) Teflon estimates that Covid-19 has a 3.9% mortality rate.
As we can all see, Teflon's estimates are significantly different than the CDC, and the known truth. I have had the flu at least a dozen times, and I am not dead. Therefore, I am either extremely lucky, or Teflon's estimate is extremely wrong.
So lets work backwards on this one, if Teflon's number is wrong, then the whole logical argument to get to that number must be wrong. Teflon is making a mistake. If he has made a mistake in one place, where he claims to know more than the experts, isn't it more like in other places he claims he knows more than the experts he has also made a mistake?