• Eurosurveillance · Mar 2021

    Robust antibody responses in 70-80-year-olds 3 weeks after the first or second doses of Pfizer/BioNTech COVID-19 vaccine, United Kingdom, January to February 2021.

    • Sathyavani Subbarao, Lenesha A Warrener, Katja Hoschler, Keith R Perry, Justin Shute, Heather Whitaker, Michelle O'Brien, Frances Baawuah, Paul Moss, Helen Parry, Shamez N Ladhani, Mary E Ramsay, Kevin E Brown, and Gayatri Amirthalingam.
    • Immunisation and Countermeasures Division, National Infection Service, Public Health England, London, United Kingdom.
    • Eurosurveillance. 2021 Mar 1; 26 (12).

    AbstractSera were collected from 185 adults aged ≥ 70 years in London to evaluate the immune response to COVID-19 vaccines. A single dose of Pfizer/BioNtech vaccine resulted in > 94% seropositivity after 3 weeks in naïve individuals using the Roche Spike antibody assay, while two doses produced very high spike antibody levels, significantly higher than convalescent sera from mild-to-moderate PCR-confirmed adult cases. Our findings support the United Kingdom's approach of prioritising the first dose and delaying the second dose of COVID-19 vaccine.

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