Fantastic news. Initial lab studies show a third dose of Pfizer’s COVID-19 vaccine neutralizes Omicron. A booster with the current version of the vaccine RAISES antibodies 25-FOLD providing a similar level as observed after two doses against the original virus and other variants!
As 80% of epitopes in the spike protein recognized by CD8+ T-cells are not affected by the mutations in Omicron, two doses MAY STILL induce protection against severe disease.
Blood plasma from people immunized with two doses of the vaccine had a 25-fold reduction in neutralizing antibody levels versus Omicron, when compared with the original strain of the virus, boosters RESTORE that loss.
Pfizer continues to advance the development of a variant-specific vaccine for Omicron and expect to have it available by March 2022 in the event that an adaption is needed to further increase the level and duration of protection.
“It’s clear from these preliminary data that protection is improved with a third dose,” Pfizer Chief Executive Officer Albert Bourla said in a statement. The initial data show a third dose could offer still offer enough protection from disease, BioNTech CEO Ugur Sahin said.
I’ll post the data as soon as we have it. In the meantime, you can read this and more here:
bloomberg.com/news/articles/…
pfizer.com/news/press-rel…
•This is in regards to INFECTION
•No going back to “square one”
•THIS IS NOT VE %, just nAbs
•Boosters are ESSENTIAL
•Steer clear of those suggesting vaccines are rendered useless based on early lab data
•Most IMPORTANT evidence to look out for is VE based on CLINICAL DATA
From Pfizer, three doses neutralize Omicron! LOOKS VERY similar to what we see with Delta here: nejm.org/doi/full/10.10… Stay calm. Stay vigilant. Breathe and Get Boosted! pfizer.com/news/press-rel…
“Study of blood samples in a laboratory is not proof of how the vaccines will perform in the real world. While antibodies are the first line of defense against infection, they are only part of a wider-ranging and powerful response by the immune system.”nytimes.com/2021/12/08/hea…

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More from @sailorrooscout

9 Dec
World Health Organization: Preliminary data indicates hospitalizations in South Africa remain LOW, and emerging data indicates Omicron may cause LESS severe illness and is MILDER, but possibly more transmissible. Immunity through vaccination and previous infection is kicking in!
While researchers are still working to determine whether omicron is fueling the surge, the WHO said that emerging data from South Africa indicates the new variant may cause less severe illness. Data on COVID-19 hospitalizations across South Africa between November 14th and
December 4th show that intensive care unit occupancy was only 6.3%, which the WHO said is very low compared with the same period when the country was facing the peak linked to the Delta variant in July.
Read 7 tweets
7 Dec
Preliminary data on Omicron and whether it escapes vaccine antibodies shows immune escape is “robust” but NOT complete- it’s partial! Reduction in nAbs was even LESS in those who had a previous infection & two doses of Pfizer’s vaccine. Boosters should be able to take this on!🧵
VERY prelimary data so numbers subject to change but live virus studies show a 20-40 fold reduction in nAbs with two doses of Pfizer’s vaccine. ONLY TWO. This is NOT regarding boosters. CRUCIAL point: the reduction was not total. It’s partial. I know the number sounds alarming-
BUT that DOES NOT mean 40%-60% decrease in vaccine efficacy! Please don’t get confused. I told you guys these vaccines could take a hit and still hold up. Now, let’s continue.
Read 11 tweets
7 Dec
Sotrovimab, a COVID-19 antibody treatment that has been approved in the UK, has proven to be effective against ALL new mutations in the spike protein of the Omicron variant, NOT just the key mutations. The tests included ALL 37 mutations identified to-date in the spike protein.
Sotrovimab reduced the risk of hospitalization and death in people with mild to moderate COVID-19 by 79% in trials.
Given the less than three-fold drop in neutralization during tests, developers are confident that Sotrovimab will continue to provide significant benefit for the early treatment of patients hoping to avoid the most severe consequences of COVID-19. The injected antibodies are just
Read 11 tweets
3 Dec
If you are wondering what is going on in South Africa in regards to Omicron, doctors describe what they are seeing thus far. bloomberg.com/news/articles/…
Now, if one is wondering why hospitalizations are going up, according to their MOH, 90% of hospitalizations in South Africa are unvaccinated individuals (zero doses), 10% remaining are mostly partially vaccinated (one dose) Low vaccination rates (less than 30% fully vaccinated).
In regards to the rise in cases, this isn’t exactly surprising based on the study I highlighted yesterday on Omicron’s ability to reinfect. Per in article in this thread, hospitalizations seem to be lower proportion of cases than previous waves. medrxiv.org/content/10.110…
Read 9 tweets
2 Dec
Epidemiological data from South Africa shows a 3-fold increase in risk for reinfection due to Omicron vs. Beta and Delta. These findings provide epidemiological evidence for Omicron’s ability to evade immunity from prior infection.

GET VACCINATED.

medrxiv.org/content/10.110…
NOTE: This is from PREVIOUS INFECTION, NOT VACCINE INDUCED IMMUNITY. Vaccinated individuals are significantly better protected from illness, hospitalization, AND death due to COVID-19 compared to unvaccinated individuals in regards to other variants and we will likely see this
with regards to Omicron. PLEASE, if you have not gotten vaccinated yet, do so. If you are eligible for a booster, please DO NOT wait for a variant specific booster.
Read 4 tweets
1 Dec
Regarding the 1st case of Omicron in the U.S. What do you need to know?
•California (San Francisco)
•Returned from South Africa on November 22nd
•Fully VACCINATED
•MILD symptoms that are IMPROVING
•Self-quarantining, all close contacts have tested NEGATIVE

Get vaccinated.
NOTE: This individual was NOT boosted.
Figured I would put this out there now because you’re not going to find too many media outlets giving you much information at the moment unfortunately.
Read 6 tweets

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