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Covid-19 vaccine: South Africa halts AstraZeneca jab
South Africa has put its roll-out of the Oxford-AstraZeneca vaccine on hold after a study showed "disappointing" results against its new Covid variant. Aaron Richterman is an epidemiologist who specialises in Infectious Diseases at the University of Pennsylvania.
(Picture: AstraZeneca Covid-19 vaccine vial Credit: Reuters)
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