news:vaccine tweaked for South African variant ready for testing fuz2021-02-25 08:26:23

Moderna says COVID vaccine tweaked for South African variant is ready for testing 

https://www.marketwatch.com/story/moderna-says-covid-vaccine-tweaked-for-south-african-variant-is-ready-for-testing-11614201495

People who have received two doses of Moderna’s original shot will be given the new one, and researchers will track its safety and efficacy.

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Pfizer also working on the third dose

https://www.nbcnews.com/news/amp/ncna1258775

Pfizer CEO Albert Bourla said the hope is that a third dose will boost the immune response even higher, offering better protection against variants.

"We believe that the third dose," Bourla said, "will raise the antibody response 10- to 20- fold."

The new study will monitor the safety and efficacy of a third dose in two age groups: those 18 to 55 and those 65 to 85. The participants come from a group of people who were among the first to receive the Pfizer-BioNTech vaccine: people who volunteered for Pfizer's initial Phase 1/2 clinical trial, which began in May.