Evidence map›Paper›PMID 34930441›Full record

ArticleBiology of sex differences2021

Sex differences in the immune response to acute COVID-19 respiratory tract infection.

Shaohua Qi, Conelius Ngwa, Diego A Morales Scheihing, Abdullah Al Mamun, Hilda W Ahnstedt, Carson E Finger, Gabriela Delevati Colpo, Romana Sharmeen, Youngran Kim, HuiMahn A Choi and 2 more

Open access · goldAbstract read
In one paragraph

Article in Biology of sex differences, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed
8.8field-weighted citation impact, top 2% 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

61 citing papers in PubMed, 85 citations in OpenAlex.

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  7. iScience · 2025
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  17. The effect of COVID-19 and sex differences on natural killer cell cytotoxicity.Frontiers in cellular and infection microbiology · 2025
    Article
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  20. Article

1 more citing papers are in PubMed but not listed here.

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

12 authors at 2 institutions in 1 country.

Shaohua Qi *Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
Conelius Ngwa *Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
Diego A Morales ScheihingDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
Abdullah Al MamunDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
Hilda W AhnstedtDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
Carson E FingerDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
Gabriela Delevati ColpoDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
Romana SharmeenDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
Youngran KimDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
HuiMahn A ChoiDepartment of Neurosurgery, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
Louise D McCulloughDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
Fudong LiuDepartment of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA. Fudong.Liu@uth.tmc.edu.ORCID 0000-0002-7684-9428
The University of Texas Health Science Center at Houston · USThe University of Texas Health Science Center · US

Funding

Sex specific immune response to SARS-CoV-2 leads to chronic neurologic symptomsR01MH127856 · NIMH · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI LIU, FUDONG, MCCULLOUGH, LOUISE D. · 2021 to 2025
$3.7M
Contribution of the X Chromosome to Sex Differences in StrokeR01NS108779 · NINDS · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI LIU, FUDONG, MCCULLOUGH, LOUISE D. · 2018 to 2022
$2.7M
NIH HHS R01 MH127856NIH HHS R01 NS108779NIMH NIH HHS R01 MH127856NINDS NIH HHS R01 NS108779
6 · The paper itself

Abstract

backgroundSex differences in COVID-19 are increasingly recognized globally. Although infection rates are similar between the sexes, men have more severe illness. The mechanism underlying these sex differences is unknown, but a differential immune response to COVID-19 has been implicated in several recent studies. However, how sex differences shape the immune response to COVID-19 remains understudied.

methodsWe collected demographics and blood samples from over 600 hospitalized patients diagnosed with COVID-19 from May 24th 2020 to April 28th, 2021. These patients were divided into two cohorts: Cohort 1 was further classified into three groups based on the severity of the disease (mild, moderate and severe); Cohort 2 patients were longitudinally followed at three time points from hospital admission (1 day, 7 days, and 14 days). MultiPlex and conventional ELISA were used to examine inflammatory mediator levels in the plasma in both cohorts. Flow cytometry was conducted to examine leukocyte responses in Cohort 2.

resultsThere were more COVID

conclusionSex differences exist in hospitalized patients with acute COVID-19 respiratory tract infection. Exacerbated inflammatory responses were seen in male vs. female patients, even when matched for disease severity. Males appear to have a more robust innate immune response, and females mount a stronger adaptive immune response to COVID-19 respiratory tract infection.

Indexed as

COVID-19ImmunityFemaleHumansMaleSex FactorsCOVID-19CytokineImmune responseLeukocytesSex difference

Identifiers

PMID34930441
PMCPMC8686792
OpenAlexW4200011477

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.