Epidemiological and Immunological Features of Obesity and SARS-CoV-2

Viruses. 2021 Nov 6;13(11):2235. doi: 10.3390/v13112235.

Abstract

Obesity is a key correlate of severe SARS-CoV-2 outcomes while the role of obesity on risk of SARS-CoV-2 infection, symptom phenotype, and immune response remain poorly defined. We examined data from a prospective SARS-CoV-2 cohort study to address these questions. Serostatus, body mass index, demographics, comorbidities, and prior COVID-19 compatible symptoms were assessed at baseline and serostatus and symptoms monthly thereafter. SARS-CoV-2 immunoassays included an IgG ELISA targeting the spike RBD, multiarray Luminex targeting 20 viral antigens, pseudovirus neutralization, and T cell ELISPOT assays. Our results from a large prospective SARS-CoV-2 cohort study indicate symptom phenotype is strongly influenced by obesity among younger but not older age groups; we did not identify evidence to suggest obese individuals are at higher risk of SARS-CoV-2 infection; and remarkably homogenous immune activity across BMI categories suggests immune protection across these groups may be similar.

Keywords: COVID-19; SARS-CoV-2; body mass index; clinical features; epidemiology; immunity; obesity.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adolescent
  • Adult
  • Age Factors
  • Antibodies, Viral / blood*
  • Body Mass Index
  • COVID-19 / complications*
  • COVID-19 / epidemiology
  • COVID-19 / immunology*
  • COVID-19 / physiopathology
  • Female
  • Humans
  • Immunoglobulin G / blood
  • Male
  • Middle Aged
  • Obesity / complications*
  • Obesity / immunology*
  • Risk Factors
  • SARS-CoV-2 / immunology
  • Spike Glycoprotein, Coronavirus / immunology*
  • Young Adult

Substances

  • Antibodies, Viral
  • Immunoglobulin G
  • Spike Glycoprotein, Coronavirus
  • spike protein, SARS-CoV-2