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The definition of 'fully vaccinated' is changing to three Covid-19 doses
CNN
Covid-19 vaccines helped to prevent tens of thousands of deaths among seniors in the US between January and May of this year. Despite their widespread availability and efficacy, many people are refusing a shot.
Waning vaccine immunity and rising infections due to the Delta variant has prompted wealthy nations to reconsider the definition of "fully vaccinated" -- which usually means two Covid-19 jabs.
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