Covid-19 Variants And Vaccine Efficacy

The video discusses the emergence of COVID-19 variants, particularly the South African and Brazil variants, which have mutations that may help the virus evade the immune system. It examines the impact of these variants on the efficacy of Moderna and Pfizer vaccines, which still show high efficacy rates. The video also highlights the potential need for vaccine upgrades or boosters. It mentions upcoming vaccines from Johnson & Johnson and AstraZeneca, and the progress of Novavax in trials. Moderna and Pfizer are preparing to respond to variants that might escape immunity.

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