Evidence map›Paper›PMID 34960189›Full record

ArticleVaccines2021

Antibody Response of BNT162b2 and CoronaVac Platforms in Recovered Individuals Previously Infected by COVID-19 against SARS-CoV-2 Wild Type and Delta Variant.

Ruiqi Zhang, Ka-Wa Khong, Ka-Yi Leung, Danlei Liu, Yujing Fan, Lu Lu, Pui-Chun Chan, Linlei Chen, Kelvin Kai-Wang To, Honglin Chen and 3 more

Open access · goldAbstract read
In one paragraph

Article in Vaccines, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
1.6field-weighted citation impact, top 14% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

17 citing papers in PubMed, 26 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors at 1 institution in 1 country.

Ruiqi ZhangDepartment of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.ORCID 0000-0002-4859-3445
Ka-Wa KhongDepartment of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
Ka-Yi LeungDepartment of Microbiology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
Danlei LiuDepartment of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
Yujing FanDepartment of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
Lu LuDepartment of Microbiology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
Pui-Chun ChanDepartment of Microbiology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
Linlei ChenDepartment of Microbiology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
Kelvin Kai-Wang ToDepartment of Microbiology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
Honglin ChenDepartment of Microbiology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.ORCID 0000-0001-5108-8338
Kwok-Yung YuenDepartment of Microbiology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
Kwok-Hung ChanDepartment of Microbiology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.ORCID 0000-0003-1771-8249
Ivan Fan-Ngai HungDepartment of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.ORCID 0000-0002-1556-2538
University of Hong Kong · HK

Funding

Food & Health Bureau, HKSAR Health and Medical Research Fund, Commissioned Research on the Novel Coronavirus Disease (COVID-19) (COVID190125)
6 · The paper itself

Abstract

Vaccinating recovered patients previously infected by COVID-19 with mRNA vaccines to boost their immune response against wild-type viruses (WT), we aimed to investigate whether vaccine platform and time of vaccination affect immunogenicity against the SARS-CoV-2 WT and Delta variant (DV). Convalescent patients infected by COVID-19 were recruited and received one booster dose of the BNT162b2 (PC-B) or CoronaVac (PC-C) vaccines, while SARS-CoV-2 naïve subjects received two doses of the BNT162b2 (CN-B) or CoronaVac (CN-C) vaccines. The neutralizing antibody in sera against the WT and DV was determined with live virus neutralization assay (vMN). The vMN geometric mean titre (GMT) against WT in recovered individuals previously infected by COVID-19 reduced significantly from 60.0 (95% confidence interval (CI), 46.5-77.4) to 33.9 (95% CI, 26.3-43.7) at 6 months post recovery. In the PC-B group, the BNT162b2 vaccine enhanced antibody response against WT and DV, with 22.3-fold and 20.4-fold increases, respectively. The PC-C group also showed 1.8-fold and 2.2-fold increases for WT and DV, respectively, after receiving the CoronaVac vaccine. There was a 10.6-fold increase in GMT in the CN-B group and a 1.3-fold increase in the CN-C group against DV after full vaccination. In both the PC-B and PC-C groups, there was no difference between GMT against WT and DV after vaccination. Subjects in the CN-B and CN-C groups showed inferior GMT against DV compared with GMT against WT after vaccination. In this study, one booster shot effectively enhanced the pre-existing neutralizing activity against WT and DV in recovered subjects.

Indexed as

COVID-19Delta variantsvaccines

Identifiers

PMID34960189
PMCPMC8705363
OpenAlexW4200460312

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.