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It is not certain that scientists will be able to create an effective vaccine against the coronavirus that has caused the COVID-19 pandemic, but it could take a year before one were to be invented, the head of the World Health Organisation (@who) said. "It would be very difficult to say for sure that we will have a vaccine," Tedros Adhanom, Director General of the WHO said. "We never had a vaccine for a coronavirus. So this will be, when discovered, hoping that it will be discovered, it will be the first one," he said. @drtedros (News source: News 18) #coronavirus #Covid #COVID19 #vaccine #health #pandemic