Pfizer booster shot: The ‘unexpected’ side effect after third dose – Pfizer finding

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A drop-off in antibody levels after a second dose of the vaccine has informed the recommendation of a third booster shot for over-50s and younger adults with health conditions in the UK. Invitations to book the third coronavirus vaccine will today be sent out to more than a million Britons in a bid to “strengthen the wall of defence” against COVID-19 created by the vaccine. Higher protection in vulnerable groups offers hope of avoiding a spike in hospital admissions during the approaching winter months. In new data submitted to the Food and Drug Administrations [FDA], Pfizer has outlined the different side effects to expect from a third dose of their vaccine.

The majority of the recorded side effects ranged from mild to moderate.

Experts studying 306 booster recipients found that 44 of them developed an unexpected side effect, reported Texas Breaking.

The most unexpected side effect observed was the swelling of lymph nodes, which appeared in 16 of the 306 participants.

Five percent of the study subjects who experienced swollen lymph nodes were women, the drugmaker said.


The side effect appeared within four days of the shot, and all but one case of the condition were considered mild.

When researchers compared these side effects with those of second-dose recipients, they noted the booster shot’s side effects were similar.

A prior study on second-dose recipients aged between 16 and 55 had found that 61.5 percent developed fatigue, 54 percent suffered headaches and 39.3 percent had muscle pains.

The FDA has not yet commented on the findings submitted by the drugmaker.

It unanimously recommended a ‘booster dose’ to people older than 65 and at higher risk of severe COVID-19.

The FDA is expected to make a final decision in the wake of the committee’s non binding vote.

The matter will thereafter be turned over to the Centers for Disease Control and Prevention, who will meet next week to decide when to roll out the boosters and to whom.

The panel dealt a blow to President Joe Biden’s plan to begin rolling out COVID-19 booster shots to most Americans as from next week.

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