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Covid: Pfizer and Moderna jabs give best overall boost, UK trial finds
…Out of seven different vaccines tested, all were found to be safe, and the side effects, including headache, fatigue and pain around the injection site, were generally mild.
The vaccines trialled were Oxford-AstraZeneca, Pfizer-BioNTech, Moderna, Novavax, Janssen, Curevac and Valneva - although the last two are no longer being made.
All seven vaccines boosted immunity when given after two doses of Oxford-AstraZeneca, and six were effective following two doses of Pfizer - but some worked better than others.
Overall, the mRNA vaccines - Moderna and Pfizer - gave the best boost to antibodies and T-cells, which are known to be important factors in how well vaccines work, particularly after two initial doses of AZ.
The vaccines were equally effective in the over-70s and under-70s.
The researchers say they found a strong response to all variants of the virus, including Alpha, Delta and the original strain, and hope this will translate into protection against Omicron too.
But they caution that further data will be necessary to work out what this means for long-term protection against serious disease……….
www.bbc.co.uk/news/...oVQgO_HfUr5a3rTXhrFc6VaNZ3yvFTpj9hhqhVM