Harambe wrote:
Natural immunity is garbage? The latest paper out of the UK suggests as much:
Only 61% effective against DEATH after COVID reinfection.
When compared to primary infection, COVID-19 reinfection cases had a 61% (56% to 65%) reduced risk of death within 28 days of testing positive for SARS-CoV-2.
https://www.journalofinfection.com/article/S0163-4453(22)00010-X/fulltextThese numbers are shockingly low for infection driven immunity. I'm not sure I believe it. But, always good to post the latest data.
I don't know what to think about this study. On the one hand, prior infection appears to nearly eliminate subsequent infection, but the time frames aren't the same.
First infections are counted during the entire time frame, but a subsequent infection can't occur until AFTER the first infection so the time frame might be significantly shorter for some cases. Plus, there's a 90-day period after the first case when a subsequent infection cannot be counted, per the study guideline as it might be a persistent first case of covid.
Put another way, a person has 15 months (the cutoff range of this study) to get covid and be counted as a first infection, but a person who gets covid at the 7 month point would get a 90-day no count and be eligible to get a 2nd infection count for only 4 of the 15 months. The study might have adjusted for this, but I didn't see it if they did.