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http://youtu.be/lGtKcSR734s The world's leading scientists have expressed delight, along with a strong note of caution, at the news that a vaccine against coronavirus has proved 90% effective in early results. The vaccine, developed by pharma giant Pfizer and its partner BioNtech, has been tested on 43,500 people in 6 countries with no safety concerns raised so far. England's deputy chief medical officer Jonathan Van-Tam said he was hopeful the vaccine could begin to be available by Christmas and more widely by next spring. Boris Johnson said that “one significant hurdle” had been cleared but there were several more to go. And some experts pointed out that the announcement was made on the basis of very early analysis, with the vaccine not yet formally approved. International st...

http://youtu.be/lNvbV6saQT0 There has been some promising Covid-19 vaccine news. A preliminary analysis shows the first effective coronavirus vaccine can prevent more than 90% of people from getting Covid-19. But there's still a way to go before any vaccine can be given to the wider public and our lives can go back to how they were pre-pandemic. BBC health correspondent Laura Foster helps puts this news into context. Video by Laura Foster and Terry Saunders Please subscribe HERE http://bit.ly/1rbfUog