U.K. administers first Covid vaccine to 90-year-old grandma: ‘If I can do it, so can you’

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The U.K. administered the first Covid-19 vaccines to the public on Tuesday, making it one of the first countries in the world to do so. Ninety-year-old Margaret Keenan made history as the world’s first person to receive the Pfizer-BioNTech…