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What Does the Pfizer Vaccine News Mean?
Covid vaccine explained.
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.
91热爆 health correspondent Laura Foster helps puts this news into context.