Sorry
@Twinkletoes123 but that person’s summary of the report is full of errors.
For reference here are the relevant section from the report.
This first section points out that antibodies, particularly in the elderly, have gradually waned over time. This has been clearly communicated since being first identified in Israel and was the whole rationale for the boosters (even prior to Omicron) which not only boost the antibody levels back up to where they were but increase them. Here is the very large UK study in boosters
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(21)02717-3/fulltext and one from the US about the higher antibody levels than the first two vaccinations
https://news.northwestern.edu/stories/2021/11/boosters-increase-protection-over-full-vaccine-dose/ . The text itself points out the increase in the older groups antibody levels as the booster program began (this report is from Octover)
The second section is here where they talk about those who have experienced past infection and as expected those who have an infection also produce antibodies. However they don’t split out those who only have antibodies from an infection and, givem vaccine coverage rates in the UK a lot of these results will come people like
@maccavennie who was infected then vaccinated/boosted and
@BlueToff who had 1 vaccination and then infected and then 2nd vaccination. They have hybrid immunity which (as their bodies have essentially seen the virus multiple times over a period of time) have very good antibodies.
Unfortunately the antibodies acquired from an infection immunity also wanes, it is the reason that places like Manaus in Brazil had two awful waves and India was hit hard by Delta. You can also see it in South Africa recently with Omicron - a lot of the reinfections were people who had only just been infected during their Delta wave.
The new Omicron variant of the coronavirus poses a threefold higher risk of reinfection than the currently dominant Delta variant and the Beta strain, a group of South African health bodies said on Thursday.
www.reuters.com
An analysis of routine surveillance data from South Africa from March 2020 till Nov. 27 showed the "reinfection risk profile of Omicron is substantially higher than that associated with the Beta and Delta variants during the second and third waves," NICD said in the statement on Thursday.
An increase of reinfections rather than new infections would be an indication the new variant has developed the ability to evade natural immunity from previous infection, it said.
Juliet Pulliam, director of SACEMA and the author of the pre-print paper, said in her article that Omicron's pattern is likely to be established across all provinces of South Africa by early to mid-December, NICD said.