Dataset Information

Immune responses to the ChAdOx1 nCoV-19 and BNT162b2 vaccines and to natural COVID-19 infections over a three-month period.

ABSTRACT:

Background

There are limited data directly comparing immune responses to vaccines and to natural infections with COVID-19. This study assessed the immunogenicity of the BNT162b2 and ChAdOx1 nCoV-19 vaccines over a 3-month period and compared the immune responses with those to natural infections.

Method

We enrolled healthcare workers (HCWs) who received BNT162b2 or ChAdOx1 nCoV-19 vaccines and COVID-19-confirmed patients, and then S1-IgG and neutralizing antibodies and T cell responses were measured.

Results

A total of 121 vaccinees and 26 patients with confirmed COVID-19 were analyzed. After the 2 nd dose, the BNT162b2 vaccine yielded S1-IgG antibody responses similar to natural infections (2241 ± 899 vs. 2601 ± 5039, p=0.676), but significantly stronger than the ChAdOx1 vaccine (174 ± 96, p <0.0001). The neutralizing antibody titer generated by BNT162b2 was 6-fold higher than that generated by ChAdOx1, but lower than that by natural infection. T cell responses persisted for the 3 months in the BNT162b2 and natural infection but decreased in the ChAdOx1.

Conclusions

Antibody responses after the 2 nd dose of BNT162b2 are higher than after the 2 nd dose of ChAdOx1 and like those occurring after natural infection. T cell responses are maintained longer in BNT162b2 vaccinees than in ChAdOx1 vaccinees.

SUBMITTER: Kim JY

PROVIDER: S-EPMC8767884 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature

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Publications

Immune Responses to the ChAdOx1 nCoV-19 and BNT162b2 Vaccines and to Natural Coronavirus Disease 2019 Infections Over a 3-Month Period.

Kim Ji Yeun JY Lim So Yun SY Park Soonju S Kwon Ji-Soo JS Bae Seongman S Park Ji Young JY Cha Hye Hee HH Seo Mi Hyun MH Lee Hyun Jung HJ Lee Nakyung N Kim Kideok K Shum David D Jee Youngmee Y Kim Sung-Han SH

The Journal of infectious diseases 20220301 5

<h4>Background</h4>There are limited data directly comparing immune responses to vaccines and to natural infections with coronavirus disease 2019 (COVID-19). This study assessed the immunogenicity of the BNT162b2 and ChAdOx1 nCoV-19 vaccines over a 3-month period and compared the immune responses with those to natural infections.<h4>Method</h4>We enrolled healthcare workers who received BNT162b2 or ChAdOx1 nCoV-19 vaccines and patients with confirmed COVID-19 and then measured S1 immunoglobulin ...[more]

PMID: 34850034

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