Yaneer Bar-Yam (30 janvier 2022) :
▻https://twitter.com/yaneerbaryam/status/1487814184104517632
Merchants of herd death oversold immunity. People are being reinfected immediately again after Omicron infection.
We have the data: Both laboratory experiments and actual cases.
Evidence from a study showing immunity based upon “mild" Omicron infection is weak for Omicron reinfection, and limited for cross immunity to Delta infection.
▻https://www.medrxiv.org/content/10.1101/2022.01.25.22269794v1.full.pdf
Overall, immunity from Omicron infection is much lower than the immunity from Delta infection, correlated with the severity of infection. So unless you get a severe infection with all of its consequences you also don’t get immunity from having another infection.
And recall even immunity from severe infection wanes rapidly in a few months.
Summary: “Neutralizing immunity...from Omicron and Delta”
"We found a significantly smaller rise of neutralization titers associated with milder Omicron breakthrough infection in vaccinated individuals, to only approximately one-third of the rise associated with boosting.
“We also identified limited cross-variant immunity to Delta.”
"Thus, breakthrough infection from Omicron may enhance cross-protection against Delta, and vice-versa, [only] inasmuch as there is a sufficiently large increase in baseline neutralizing immunity, which appears to be related to the clinical severity of the infection.
"Our findings parallel those from another study from our group that demonstrated limited cross-variant immunity after milder Omicron variant infection in unvaccinated individuals in a mouse model and in human patients.
"Taken together, our results suggest that Omicron-induced immunity may not be sufficient to prevent infection from another, more pathogenic variant, should it emerge in the future.
Actual cases of reinfection by Omicron are so widespread they are manifest to anyone who is not closing their eyes:
@DrSalandyinGA: “My latest news is that kids are now getting reinfected within 30 days of their COVID infection...and yes they tested negative in between.”
▻https://twitter.com/DrSalandyinGA/status/1486126028200333319
(See comments in that thread)
Important addition:
Anthony Leonardi @fitterhappierAJ has shown that the immune system T-cells are damaged by covid (shades of HIV), potentially undermining not just Covid immunity but immunity to other diseases, and part of Autoimmune dysfunction after covid.
▻https://twitter.com/fitterhappierAJ/status/1485965771981430792
