How Long Does Your Covid Immunity Last With The New Booster Jab?

In anticipation of an autumn and winter surge in Covid cases, new bivalent jabs are now being rolled out in the autumn booster programme.

The latest vaccine protects against the highly transmissible Omicron variant while also bumping up protection against the original strain of Covid-19.

If you are on the eligible list for another Covid vaccine, you can get the booster now. If not, you will have to wait a few months longer.

Either way, it’s important to get this new Covid jab as soon as you are eligible, as it can prevent you from severe outcomes, including hospitalisation or death, throughout the autumn and winter seasons.

Just how long will this new jab protect you overall, though? Experts weigh in.

It’s not yet known how long immunity lasts after the new jab, but experts have some theories

For now, there’s no exact timeline for how long immunity persists after getting the booster, according to Dr Andy Pekosz, co-director of the Center of Excellence for Influenza Research and Response at the Johns Hopkins Bloomberg School of Public Health. This is because the vaccine is new — it was authorised by the Food and Drug Administration in the US and the Joint Committee On Vaccination and Immunisation in the UK.

It’s important to note that there are lots of studies that are measuring the immunity timeline, Dr Pekosz said― and many of those studies are happening now.

One study published in the New England Journal of Medicine found that this new jab’s protection lasted at least a month (but it likely lasts longer than that, since the study has measured only a month so far). Additionally, previous studies of other bivalent Covid vaccines showed that immunity lasted about six months.

In time, experts will know how long immunity lasts, but for now, that information is still coming.

Experts have no reason to believe immunity wanes any faster than with previous boosters, so it could last four to six months

Just how long you’re protected after a Covid booster jab varies from person to person, and it has also rapidly changed as new Covid mutations emerge that can evade antibodies. But generally after previous Covid jabs, you were protected for about four to six months.

Both Dr Pekosz and Dr Benjamin Abramoff, On/Go medical adviser and founder and director of Penn Medicine’s Post-Covid Assessment and Recovery Clinic, said there is no reason to believe your immunity will wane any sooner after this new booster.

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