by Nina Larson with AFP Bureaus GENEVA, Switzerland (AFP) — The World Health Organization insisted Monday that the AstraZeneca vaccine was still a vital tool in the global fight against the coronavirus pandemic, after South Africa delayed the start of its inoculation programme over concerns about its efficacy against a virus variant. “It is vastly too early to be dismissing this vaccine,” said Richard Hatchett, who heads the Coalition for Epidemic Preparedness Innovations (CEPI), which […]