COVID-19 booster: How long does it stop Omicron?

How long are the third and fourth booster shots effective at stopping Omicron?

COVID-19 vaccine

New data could tell us how long the COVID-19 booster vaccine stops the symptoms of Omicron.


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COVID-19 booster vs. Omicron

A study at the U.K. Health Security Agency reported new data on how long the COVID-19 vaccine booster shot could potentially stop the Omicron variant. Read more about it here.

The study found that about two weeks after the third dose of Pfizer, the risk of infection drops to 70%.

The risk of symptomatic COVID-19 is about 50% three months after the booster.

Despite the new information discovered,  a separate study estimated that four months after the booster, protection will reduce to 40%.

Immunologist Jennifer Gommerman at the University of Toronto, says that the efficacy against infection relies on the amount of antibodies. These antibodies are our first defense against SARS-CoV-2, otherwise known as COVID-19.

It is important to note that SARS-CoV-2 is the original strain of COVID and is what we are vaccinated against. The protection from the vaccine may take awhile because it is dependent on how well the antibodies recognize Omicron.

A study in Israel found that the antibodies created by the fourth dose of the vaccine probably are not enough to combat Omicron.


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