Covid vaccine breakthrough as study finds 'sharp decline' just 6 months after jab

The BIDMC researchers have now pitted the three vaccines against each other and compared the corresponding immune responses after an eight-month period.

In total, the study examined the levels of Covid antibodies, T-cells and other immune products in 61 participants.

The data was collected at two to four weeks after full complete immunisation – the peak time of immunity – to eight months after the jab.

Of the 61 people, 31 received the Pfizer/BioNTech jab, 22 were given the Moderna jab and only eight were given the Janssen jab.


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