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. 2022 Apr;54(4):292-296.
doi: 10.1080/23744235.2021.2014559. Epub 2021 Dec 17.

Comparison of Covid-19 antibody status after vaccination between residents in long-term geriatric care and residents assisted-living facilities

Jochanan E Naschitz  1 , Jennifer Kertes  2 , Galit Pinto  1 , Natalia Zaigraykin  1 , Dana Oz  1 , Ella Goland  1 , Shuruk Nasser  2 , Lia Supino-Rosin  3 , Rachel Lazar  3 , Anat Ekka-Zohar  2
Affiliations

Comparison of Covid-19 antibody status after vaccination between residents in long-term geriatric care and residents assisted-living facilities

Jochanan E Naschitz et al. Infect Dis (Lond). 2022 Apr.

Abstract

Objective: To compare 2 CoV-SARS-2 ('anti-s') antibody levels after vaccination between residents in long-term geriatric care (LTGC) and residents in assisted-living facilities who had received two doses of the BNT162b2 vaccine. SARS-CoV-2 serology was tested with Quant II IgG CoV-SARS-2. Blood samples were collected 3-4 months after administration of the second vaccine dose.

Results: Anti-s ≥ 50 AU/ml was found in 85.4% of 90 residents in LTGC (median 498 AU/ml) and 94.9% of 214 residents in assisted living (median 728 AU/ml). p = .006. Factors associated with anti-s < 300 AU/ml were multi-morbidity, diabetes mellitus and cancer.

Keywords: BNT162b2 vaccine; Covid-19; elderly; geriatric care; serology.

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