Sex hormones, autoimmunity and gender disparity in COVID-19

Area of Science:

• Immunology
• Epidemiology
• Virology

Background:

• The Coronavirus disease 2019 (COVID-19) pandemic caused significant global mortality.
• Epidemiological data reveal a notable sex-based disparity in COVID-19 outcomes, with women generally experiencing less severe disease.

Purpose of the Study:

• To explore the mechanisms underlying sex-based differences in COVID-19 outcomes.
• To investigate how immunological, genetic, hormonal, and behavioral factors contribute to these disparities.
• To identify potential therapeutic targets for improving COVID-19 clinical management.

Main Methods:

• Review of epidemiological data on COVID-19 infection, hospitalization, and mortality rates stratified by sex.
• Analysis of immunological responses, including innate and adaptive immunity, in relation to sex.
• Examination of the role of genetic factors, sex hormones, and gender-specific behaviors.
• Exploration of the impact of these factors on disease pathogenesis and response to treatments.

Main Results:

• Women demonstrate lower infection and hospitalization rates for COVID-19.
• Women generally exhibit better prognosis and reduced mortality compared to men.
• Potential contributing factors include differences in immune responses, genetics, sex hormones, and behavior.

Conclusions:

• Sex-based differences in immune responses, genetics, and hormonal interplay significantly influence COVID-19 outcomes.
• Understanding these disparities offers opportunities for developing sex-specific therapeutic strategies.
• Exploiting protective factors identified in women could enhance COVID-19 treatment and prevention.