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COVID crisis over? Vaccines working on virus variants

March 4, 2021 - 11:00 -- Admin

Key points from the UK’s COVID Symptom Study: No vaccines contain COVID-19. Pfizer better than AZ in infection risk reduction after one shot but both good: 90% reduction in hospitalisations. “Definite immunity” still a work in progress. Variants are “clobbered” by the second dose of vaccines. South African version definitely and probably Brazilian. Single-dose still

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