What is a Covid booster jab and is it different to the first and second vaccine doses?

Covid booster vaccines are to be introduced into immunocompromised adults before winter.

About half a million people are said to be contacted about the third vaccination to protect them from another possible wave in winter.

However, since many adults have only recently had their second vaccination, the concept of needing another vaccination so soon can be confusing as to why you will need one.

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But what is the difference between the third booster jab and the first and second jab?

Here’s everything we know about the third jab and why it’s different.

What is the third booster vaccination and is it different from other vaccinations?

The third vaccination will be no different from other doses of the vaccine.

The third vaccine will be introduced for immunocompromised people who are at greatest risk of developing severe Covid disease before winter.

It follows UK research that found that 40 percent of people with compromised immune systems have “low or undetectable” antibodies after two Covid vaccinations.

Officials said beneficiaries would be contacted and offered the dose, with schedules tailored to keep immunosuppression to a minimum. For example, those in need of cancer treatment would be offered a vaccine before they undergo chemotherapy, not during it.

People aged 18 and over receive either Pfizer or Moderna, and people between 12 and 17 years of age receive Pfizer.

It is not currently planned to be rolled out to all adults, but experts believe it will be rolled out once the Joint Committee on Vaccination and Immunization (JCVI) has enough data.

There is a chance that the third vaccination you will receive will be a different type of vaccine than you received before.

The UK government-funded COV Boost study is looking at whether a booster dose given 10 to 12 weeks after the second dose increases protection against coronavirus.

The study also looks at the effectiveness of mixing different vaccines – with some participants receiving a different vaccine than their first two doses for their booster dose. Vaccines studied include Oxford / AstraZeneca, Pfizer / BioNTech, Moderna, Novavax, Valneva, Janssen, and Curevac.

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