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It means you aren't protected from Omicron.

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Wear N95 masks with a tight seal

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and avoid being in close proximity to others indoors.

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The current vaccine simply isn't a good match for omicron, at least as far as infection is concerned

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An Israeli study found that a fourth shot of the COVID-19 vaccine was able to boost antibodies to higher levels than the third shot, but researchers found that it is still not enough to prevent omicron-variant infections, researchers at Israel's Sheba Medical Center said on Monday.

This is the first trial worldwide studying a fourth vaccination with combined vaccines, the Israeli hospital said, adding that the findings were preliminary and have not yet been published.

Some 150 participants in the study received a fourth dose of the BioNTech-Pfizer vaccine, while another 120 participants received a fourth vaccination with Moderna. All had received a third BioNTech-Pfizer booster. They were then compared to a control group that did not receive the fourth shot.

"The rise in antibody levels that we saw with both Moderna and Pfizer are slightly higher than what we saw after the third booster vaccine," said lead-researcher and director of the infectious disease unit, Gili Regev-Yochay.

However, "despite increased antibody levels, the fourth vaccine only offers a partial defense against the virus," she added.

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Turns out the Israeli study looked at Moderna too

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The head of Pfizer said (I read it yesterday) that two shots are not enough for Omicron. You need the booster.

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Originally posted by piqué:

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The head of Pfizer said (I read it yesterday) that two shots are not enough for Omicron. You need the booster.

I am talking to positive cases every night that had three jabs and wear a mask. Some were sick enough to goto the emergency room because they couldn't breathe.

Based on these conversations I think we need a different or improved vax for omicron.

I realize this is just local knowledge and not a rigorous study, but I'm going to take it at face value and not put myself in situations where I could be exposed.

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A new study released by the Centers for Disease Control and Prevention (CDC) found that people who were both vaccinated and had survived a prior bout of COVID-19 were best protected from infection.

The study, that examined infections in New York and California last year, found that unvaccinated people with a past infection were a close second. By fall, when the more contagious delta variant had taken over but boosters weren’t yet widespread, that group had a lower case rate than vaccinated people who had no past infection.

The Centers for Disease Control and Prevention, which released the study Wednesday, noted several caveats to the research. And some outside experts were cautious of the findings and wary of how they might be interpreted.

“The bottom line message is that from symptomatic COVID infection you do generate some immunity,” said immunologist E. John Wherry of the University of Pennsylvania. “But it’s still much safer to get your immunity from vaccination than from infection.”

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The research does fall in line with a small cluster of studies that found unvaccinated people with a previous infection had lower risks of COVID-19 diagnosis or illness than vaccinated people who were never before infected.

The new study’s findings do make sense, said Christine Petersen, a University of Iowa epidemiologist. She said a vaccine developed against an earlier form of the coronavirus is likely to become less and less effective against newer, mutated versions.

However, experts said, there are a number of possible other factors at play, including whether the vaccine’s effectiveness simply faded over time in many people and to what extent mask wearing and other behaviors played a part in what happened.

Another thing to consider: The “staunchly unvaccinated” aren’t likely to get tested and the study only included lab-confirmed cases, Wherry said.

“It may be that we’re not picking up as many reinfections in the unvaccinated group,” he said.