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pfizer-biontech

The vaccine also stimulated long-lasting immune responses the researchers said, adding booster shots seems unnecessary at this time.

Johnson & Johnson says single shot of its Covid vaccine is effective against Delta Variant

There is not adequate evidence to either confirm or reject the necessity for a booster dose after Covid vaccination, said World Health Organisation's chief scientist Soumya Swaminathan.

Explained: Is a Covid-19 vaccine booster dose required? WHO chief scientist answers

The following study published on Thursday in the journal JAMA hired around 45 healthy male volunteers aged between 18 to 50 years scheduled for mRNA Covid vaccination by Pfizer-BioNTech and Moderna.

Fact Check: Can Pfizer, Moderna Covid Vaccine reduce your sperm count?

The UK has already ordered 40m doses - enough to vaccinate 20m people, with two shots each.

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Johnson & Johnson says single shot of its Covid vaccine is effective against Delta Variant

Explained: Is a Covid-19 vaccine booster dose required? WHO chief scientist answers

Fact Check: Can Pfizer, Moderna Covid Vaccine reduce your sperm count?

UK approves Pfizer, BioNtech for early use, becomes first country in the world