@jws @MatWright

"All humoral immunities (infection-acquired, vaccine-acquired and hybrid) waned by 3–6 months. Cellular immunity was more durable but showed signs of waning by 6 months." https://smw.ch/index.php/smw/article/view/3732

That is from 2024, reviewing "205 studies, of which 70 provided data on the duration of protection against SARS-CoV-2 infection" so it's better than any review I could perform, and its references better than anything I could dredge up.

Back for early Omicron, "relative protection against infection waned from 53.4% a month after vaccination to 16.5% three months after vaccination" https://www.nature.com/articles/s41467-022-30884-6

Then it gets more contentious with damage to the immune system. There are several documented common(!) dysregulations. But if they don't manifest clinically (yet) then is it a problem (yet)?

Immunology inherently mostly takes time. But now some problems involving the immune system are more common, and "mounting evidence suggests a higher incidence of adverse consequences, such as disruption of the immune system" https://www.nature.com/articles/s41467-024-47176-w

[edit - just juggled links]

#CovidIsNotOver #SARSCoV2 #waningImmunity #COVID #COVID19 #immunology #SwissCheeseModel #maskUp #cleanAIr

Warum lassen sich viele nicht mehr impfen?

#Covid #waningimmunity

"The seven-day average of daily Covid hospitalizations reached 42,140 on Friday, an increase of 4.2% from two weeks ago, according to an NBC News tally. The seven-day average of daily intensive care unit admissions has also risen to 5,125 per day, an increase of more than 9% from two weeks ago."

Flu and RSV on the decline but Covid hospitalizations rise - NBC News https://apple.news/AZzhz5DOaQ4mdVZf4GJEIgg

And the completely absurd portion of this article:

"Still, the number of Covid hospitalizations aren't expected to reach the level they did last winter, when the original omicron variant, called BA.1, began to spread rapidly, said Dr. Isaac Bogoch, an infectious diseases physician at the University of Toronto.

He said a combination of population immunity — from either prior infection, vaccination or both — and a string of new variants that appear to be less virulent have made the virus less of a threat this winter."

They ask an Infectious Disease doc in Canada for a United States article. Toronto/Canada is overwhelmed with hospital admissions but they also have a higher vax and mask rate than the US. Waning immunity is much worse here in the US as many people have not been
boosted. Here in MA, hospital admissions are at the third highest as they've been at any time during the pandemic. Also, variant XBB 1.5 has taken over 40% cases in the last week which is incredibly fast and it's too early to tell what this variant will do.

#Covid19 #PublicHealth #waningimmunity #Wearadamnmask #CovidIsNotOver

@rnzfans
With 60,000 #Covid19 #vaccine doses about to expire in #NZ, you would hope they would open the opportunity for boosters to the majority of population who have only been allowed one #booster to date, and that was usually about 9 months ago. Especially in the wake of the summer peak of cases increasing.
#WaningImmunity

@Elvirabinamaggio1970
yes #indeed
Avoid like the #Plague it is (even tho it’s not #bacteria )

I used to get #rhinovirus constantly

Somebody told me pre-good-Google you only get rhinovirus #strains once, & I believed them #gullible me; knew somehow there were 150-ish & #calculated at 3 #annually by the time I was 70 I’d be free

Was #devastated to #discover in 2020 w/ #coronavirus #research #waningImmunity 2 year #maybe

These #mutations #recombinants are #extremely worrying #reinfection