Coronavirus vaccine: How long does COVID-19 vaccine immunity last? Here’s what research has found

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A new report by the Centers for Disease Control and Prevention (CDC) looked into the data of 4,000 vaccinated healthcare professionals and frontline workers.

The study found that the messenger RNA (mRNA) vaccines developed by Pfizer-BioNTech and Moderna were effective in 80 percent of cases after the first dose and 90 percent after the second dose.

Additionally, they discovered that the vaccines reduce the risk of COVID-19 transmission by vaccinated individuals to others.

“Reducing the risk for transmissible infection, which can occur among persons with asymptomatic infection or among persons several days before symptoms onset, is especially important among healthcare personnel, first responders, and other essential and frontline workers given their potential to transmit the virus through frequent close contact with patients and the public,” the report stated.

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