A problem with your calculations, though - O is 25% "less severe" than D for those who got sick (with Delta or Omicron) but never had _any_ immunity before they got sick with it (where immunity is having gotten fully vaccinated or having recovered from covid beforehand). So the calculation would only be correct if the 1 million and 4.2 million all had had no prior immunity (which seems unlikely in the case of Omicron, because part of the reason it's more transmissible is because it evades prior immunity (for getting the infection).RunningMn9 wrote: Wed Dec 29, 2021 4:19 pm
From other data we've seen here in the thread, O appears to be about 25% "less severe" than D. So if we randomly select a hospitalization rate of D as 2%, than we would expect the hospitalization rate of O to be around 1.5%?
Let's accept this for the moment, which references a study that concluded that O is 4.2 times as transmissible as D.
Let's say 1M people get delta, and 2% of them get hospitalized. That's 20k people into hospitals. Now imagine 4.2M people get omicron. That's 63k people into hospitals. With that kind of transmission, I would think that the omicron would have to be something like 75% less chance of hospitalization, right?
I think being fully vaccinated reduces the chance of severe infection with Delta by ~90% and for Omicron by ~70% (not sure with regards to the booster on top of being fully vaccinated).