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Covid-19 vaccine not certain, we never had vaccine for a coronavirus: WHO

World Health Organisation chief Tedros Adhanom Ghebreyesus has said it's not certain that scientists will be able to create an effective vaccine against the novel coronavirus that causes Covid-19. "We never had a vaccine for

World Health Organisation chief Tedros Adhanom Ghebreyesus has said it’s not certain that scientists will be able to create an effective vaccine against the novel coronavirus that causes Covid-19. “We never had a vaccine for a coronavirus… Hoping that there will be a vaccine (for Covid-19), the estimate is we may have a vaccine within one year,” he added.

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