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Stephen Powis, medical director of NHS England, added that 15,000 coronavirus patients were admitted to hospitals since Christmas. u lock mini Imagine if back then, a company suddenly announced then that a single dose vaccine was found to be 80-90% effective at four weeks. u lock mini Fox News)The trailing cold front from this system will bring heavy rain and possible severe weather for the Southeast and Florida. u lock mini There was worry that changes in the protein, which the virus uses to infect healthy cells, could diminish efficacy among vaccines. u lock mini