Pfizer says third vaccine dose strongly boosts protection against Covid-19 Delta variant

American biopharmaceutical company Pfizer said Wednesday a third dose of its Covid-19 vaccine can “strongly” boost protection against the Delta variant.

Antibody levels against the Delta variant in people aged 18 to 55 who receive a third dose of the Pfizer/BioNTech vaccine are greater than five-fold than following a second dose, Xinhua reported, quoting data posted at the company’s teleconference.

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