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Yep. Getting boosted (getting a booster) confers secondary immune response. The initial jabs only confer primary immune response.

See this for more info: https://bio.libretexts.org/Bookshelves/Microbiology/Book%3A_...

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I find the use of "primary" and "secondary immune response" to be misleading. FWIW

"As Hopkins Medicines suggests, the third dose of the mRNA COVID-19 vaccines- Pfizer and Moderna- is *identical* to its first two doses. "[emphasis mine]

From

https://www.republicworld.com/technology-news/science/is-pfi...

So what kind of response are we going to get from the next booster shots that have already been announced? The tertiary immune response?

We don't know if an omicron specific booster will actually work due to something called "Original Antigenic Sin". For more information, consult this: https://www.sciencedirect.com/science/article/abs/pii/S08968...

If you are eligible for a booster, then you should get one ASAP. The original coronavirus vaccine antibodies present in your body will cross-react, to a certain degree, with omicron.

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