Earlier quoted context omitted.
Here is the actual study: https://www.cdc.gov/mmwr/volumes/71/wr/mm7104e1.htm?s_cid=mm... Importantly it doesn’t account for the effect of boosters and looks at pre-omicron data. That noted the best protection seems to be had by a combination of vaccination and prior infection, which is perhaps unsurprising. Also other CDC studies suggest that natural immunity declines quicker than vaccine induced immunity ( https://…
> Importantly it doesn’t account for the effect of boosters and looks at pre-omicron data. Don't just read the summary. Look at figure 1: https://www.cdc.gov/mmwr/volumes/71/wr/mm7104e1.htm#F1_down There are unvaccinated, uninfected people...and then there is everyone else . Once you have been infected or vaccinated, the difference between is so small as to be academic. And as the authors note, the importance of natu…
This is shifting the goal. The disclaimers I cited come directly from the study and are highly relevant when comparing the effect of natural immunity vs vaccination.
> No. That's not what that study said. First, it followed symptomatic infection, not severe illness.
This doesn’t contradict what I said. The study gives evidence that natural immunity (to symptomatic infection) declines more quickly than vaccine induced immunity.
> Also, methodologically, the study you're citing was bad. It only gave credit for natural immunity to those people with confirmed infections, which was/is an underestimate, and made vaccines look more effective than they are.
One, the same effect would also have been present in the natural immunity group, as people may have been reinfected since their initial confirmed infection.
Two, this is largely irrelevant to the point I was making.
The statistical evidence suggests that even if you have had a previous confirmed infection, you’re still better off getting vaccinated.