Covid 19

COVID-19: Analyzing Sex and Analyzing Gender

The Challenge

Although infectious diseases can affect everyone, sex and gender can impact immune responses and the course of the disease in the human body. Biological impacts of the pandemic intersect with broader social and systemic challenges, such as limited healthcare, and economic and logistical resources. Current worldwide statistics on COVID-19 show more men than women dying of acute infection, while women are projected to suffer more than men from the health, economic, and social consequences of the pandemic in the long term. Innovative solutions beyond health, such as economic re-entry strategies, product development and AI solutions, also need to consider sex and gender.

Methods: Analyzing Sex

All data related to COVID-19 morbidity and mortality should be disaggregated by sex. Females generally respond more intensely to contact with viruses, such as severe acute respiratory syndrome coronavirus 2 (SARS-CoV2), both through natural infection and through vaccination. Potential impacts of these differences should be considered in diagnostics and therapeutics. Studies of COVID-19 need to integrate the sex variable, by using female and male cells and experimental animals in drug discovery and preclinical research, and women and men in clinical trials. All drug and vaccine trials should include sex-specific analyses, as females develop side effects more frequently than males.

Methods: Analyzing Gender

Preventative measures should be designed in a gender-sensitive manner. Women reportedly comply more with hand hygiene. Gender affects the division of labour and care duties in families. Women are more often employed in professions with a high risk of infection, such as healthcare, and are more often responsible for the care of sick family members. The allocation of protective equipment, therapies and financial aid should be gender-equitable. Gender-sensitive design should be used when developing digital resources for preventative measures.

Gendered Innovations:

    1. Studying Sex Differences in the Immune Response could help address the higher COVID-19 mortality in men than in women.

    2. Focusing on Dosing and Sex-Specific Side Effects of Vaccines and Therapeutics will be essential in the development of therapeutic responses against SARS-CoV2 infection and COVID-19.

    3. Analyzing Gender-Specific Risk Factors may help decrease mortality in women in the long term. In the EU, 76 % of healthcare workers are women. This has the potential to expose them significantly more to the virus; hence the need for fitted personal protective equipment.

    4. Designing Gender-Sensitive Prevention Campaigns can increase compliance and reduce exposure. For effective public health campaigns, gender-specific preferences should be analyzed and deployed in preventative measures, digital platforms, data collection wearables and AI prediction models.

    5. Considering the Gender-Specific Socioeconomic Burden of Public Safety Measures can mitigate their inequitable impact. Public health emergencies can lead to the disruption of gender roles. Women and gender-diverse individuals are at significantly more risk of experiencing economic insecurity, discrimination and gender-based violence.

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COVID-19: Analyzing Sex & Analyzing Gender

This case study was first released 28 May 2020, and is also available as a PDF here.

The Challenge

Although infectious diseases can affect everyone, sex and gender can significantly impact immune responses and the course of the disease in the human body. Importantly, the biological impacts of the pandemic intersect with broader social and systemic challenges, such as limited healthcare, and economic and logistic resources. In the case of COVID-19, current worldwide statistics show more men than women dying of acute infection (GlobalHealth5050, 2020), while women are projected to suffer more than men from the health, economic and social consequences of the pandemic in the long term. Innovative solutions beyond health, such as economic re-entry strategies, product development and AI solutions, also need to consider sex and gender.

sex term vs. gender term

Gendered Innovation 1: Studying Sex Differences in Immune Responses

Sex differences in immune responses have been reported in infectious diseases, autoimmunity and inflammation. Females appear to respond more vigorously to viral infections and produce more antibodies in response to infection and vaccination (Klein & Flanagan, 2016).

The mechanisms leading to these differences can be hormonal (i.e. the different effects of testosterone, oestrogens or progesterone), genetic (biological females have two X chromosomes while males have only one) or related to differences in intestinal bacteria.

A more vigorous immune response may induce a higher risk of autoimmune disease in females, but also a better capacity to fight infection. Initial studies report a higher production of certain subtypes of antibodies, called IgGs, in females than in males after infection with SARS-CoV2 (Zeng et al., 2020).

These differences might be relevant to the sensitivity and specificity of serological tests. The receptor used by the virus to infect host cells is the ACE2 receptor. This molecule is encoded on the X chromosome and influenced by oestrogens and androgens circulating in the body (Bukowska et al., 2017).

This means that responses to the virus and to therapies may vary, especially for groups undergoing hormonal therapies, either after menopause or to align their physical appearance with their gender identity. The possible influence of oestrogens and progesterone on the body’s response to COVID-19 in people of any gender is currently being investigated in two small trials in the United States (NCT04359329 and NCT04365127).

Gendered Innovation 2: Focusing on Dosing and Sex-Specific Side Effects of Vaccines and Therapeutics

Women appear to experience a higher overall incidence of medication side effects than men. This might be related to biological differences, differences in therapeutic choices or differences in reporting (see Case Study: Prescription Drugs). Potential sex differences in response to and the efficacy of novel therapies and vaccines need to be taken into account (Tannenbaum et al., 2017). Different doses of vaccine may be needed for females and males, and side effects may occur at different rates.

For example, females are at higher risk of developing irregularities in heart rhythm (QT prolongation) due to physiological differences in the heartbeat (see Case Study: Heart Disease in Diverse Populations). This risk increases with the use of heart medication and many other therapies, such as hydroxychloroquine and azithromycin, currently being tested for use against COVID-19.

In addition, sex-specific issues, such as the provision of potentially life-saving therapies to pregnant women while preventing fetal complications, need to be considered in the design of clinical trials. This is particularly relevant in countries with limited healthcare resources, and where fertility rates might be higher, thus significantly increasing the numbers of potentially pregnant COVID-19 patients.

The Horizon 2020 project i-CONSENT investigates the intersection of the gender dimension and ethics in informed consent. It addresses the relationship between ethics and safety when people are participating in clinical trials, including co-decision-making between partners and the impact of self-determination and power (Persampieri, 2019).

Method: Analyzing Sex

All data related to COVID-19 morbidity and mortality should be disaggregated by sex (Wenham et al., 2020). Females generally respond more intensely to contact with viruses such as SARS-CoV2, including both natural infection and vaccination (Klein & Flanagan, 2016), and the potential impacts of these differences should be considered in:

  • • identifying and reporting symptoms,
  • • developing diagnostics and testing,
  • • validating therapeutics.
All study of COVID-19 needs to integrate sex as a biological variable. This includes using female and male cells and experimental animals in drug discovery and development and in preclinical research, as well as using women and men in clinical trials. Females develop side effects to medications more frequently than males (Obias-Manno et al., 2007), and all drug and vaccine trials for COVID-19 should include sex-specific analyses.

 

sex and gender as possible modulators of Covid 19

Gendered Innovation 3: Consider Gender-Specific Risk Factors

Worldwide, women are more frequently employed in service professions, including healthcare. According to the European Institute of Gender Equality, women represent 76 % of the 49 million healthcare workers in the EU (European Institute of Gender Equality). Care professionals in hospitals, nursing homes and the community come into contact with the virus much more frequently than the general population. They are exposed to large numbers of SARS-CoV2 patients and may be exposed to higher concentrations of the virus (Liu et al., 2020). Women also perform the majority of caring duties in families and immediate communities.

Professional and private risks need to be factored into public health strategies. Healthcare workers are preferentially tested for SARS-CoV2, but is equitable access provided for informal caregivers and healthcare workers outside of hospitals? Is gender-sensitive budgeting applied in allocating emergency resources? Is personal protective equipment provided fairly to all individuals at comparable risk in healthcare institutions?

In addition to healthcare professionals, cleaning personnel and janitorial staff tend to be overexposed to the virus and require protective equipment. When developing personal protective equipment, anatomical differences need to be analyzed to ensure proper fit and to avoid ergonomic difficulties (Sutton, Irvin et al., 2014); gender-specific user preferences should also be considered (Tannenbaum et al., 2019).

An example of how an acute situation like the COVID-19 pandemic can be integrated into ongoing structural gender-mainstreaming activities is provided by the Horizon 2020 project ACT. ACT has developed a platform for communities of practice on gender equality in research organizations and has recently used its platform to host webinars offering insight into the gender dimensions of research funded on the pandemic.

Gendered Innovation 4: Design Gender-Sensitive Prevention Campaigns

Public health strategies to contain the spread of SARS-CoV2 include containing coughing and sneezing, social/physical distancing and frequent hand washing. Gender differences in the uptake of hand hygiene have been reported in the past and these findings should be incorporated into the design of preventative SARS-CoV2/COVID-19 campaigns.

Women in the general population wash their hands more frequently than men after using a bathroom (Borchgrevink et al., 2013) and women healthcare workers wash their hands more often than their male colleagues (Szilagyi et al., 2013). When investigating the gender-specific incentives for hand washing, it appears that women respond more to knowledge-based approaches (Suen et al., 2019), while men respond more to disgust (Judah et al., 2009). This means that innovations are required to engage men in more active hand washing.

For effective public health campaigns, gender-specific preferences should be analyzed and deployed in digital platforms, data collection wearables and artificial intelligence prediction models.

Gender differences are not just relevant for disease-specific prevention, but also for the management of general risk factors, such as smoking, obesity and diabetes. Smoking has been reported as a significant risk factor for severe COVID-19 disease (Guan et al., 2020) and is more common in men worldwide, although this difference is reducing in some countries.

Method: Analyzing Gender

Preventative measures should be designed in a gender-sensitive manner to reach everyone in the community. Women reportedly comply more with hand hygiene guidelines (Borchgrevink et al., 2013), and incentives to encourage such preventative behaviors should be gender-sensitive (Judah et al., 2009).

Gender affects the division of labour and care duties in families and communities. Women are more frequently employed in professions with a high risk of infection, such as healthcare, and are more frequently responsible for the care of sick family members (International Labour Organization, 2016).

The design of personal protective equipment needs to take anatomical differences into consideration as well as users’ gendered preferences. The allocation of protective equipment, therapies and financial aid should be gender-equitable. Finally, gender-sensitive design should be employed when developing digital platforms for preventative measures.

gender sensitive impact of pandemics

 

Gendered Innovation 5: Considering the Gender-Specific Socioeconomic Burden of Public Safety Measures

Limiting physical contact is important in pandemics involving viral and bacterial agents that are transmitted person-to-person. A highly transmittable airborne virus, such as SARS-CoV2, has led to social/physical distancing measures and quarantines in many parts of the world. In most parts of the world, women are more likely than men to be non-salaried employees or self-employed. They also are more likely to work in the service industries, such as care, wellness, cleaning and food handling (International Labour Organization, 2016).

The enforced closure of the service industry during quarantine has impacted the non-traditional workforce in two distinct ways: “non-essential” workers lose their jobs, leaving individuals dependent on economic support from partners, families and the state; “essential” workers are required to continue their activities under significant physical and psychological stress. Both scenarios have the potential to shift established gender roles and to lead to a surge in stress, existential fears and violence in public and domestic settings (van Gelder et al., 2020). Understanding and empathising with potential survivors is an essential aspect of prevention that has been addressed innovatively in the Horizon 2020 project VRespect.Me, which developed a training app using virtual reality to place perpetrators of domestic violence in the position of victims (Seinfeld et al., 2018).

Socioeconomic measures also harbour the potential to exacerbate existing inequalities. The design of solutions should be intersectional (see Method: Intersectional Approaches), including dimensions such as social origin and ethnicity/migration, among others. The European Research Council project GENDERMACRO investigated the complex interconnections between female empowerment and household economics. Simply providing resources to a female household member might lead to unexpected negative consequences if gender dynamics, such as power relations, role assumptions and priorities, are not taken into account (Doepke & Tertilt, 2011). These findings are essential for the development of gender-sensitive policies to improve the economic situation for all household members, especially in times of crisis such as the COVID-19 pandemic.

Service restrictions affect many domains in a gendered manner, but are especially relevant in healthcare. Emergency departments worldwide are reporting a reduction in demand not related to COVID-19, sparking concerns about the potential lack of treatment of medical emergencies, such as heart attack and strokes (Tam et al., 2020). Routine reproductive healthcare might also suffer. Political decisions taken on health priorities in several countries have already affected access to contraception as well as to medically assisted reproduction and safe abortions.

Conclusions

The SARS-CoV2/COVID-19 pandemic highlights the urgent need to incorporate sex and gender analysis into research and innovation processes. More men than women appear to die of the disease, but women are more frequently employed in high-risk jobs and disproportionately responsible for caring for those who are unwell. Sex differences in immunology and response to therapies can help elucidate disease-specific pathways, which could benefit everyone. Considering the gender dimensions of the pandemic could help mitigate the acute and long-term inequities that stem from its socioeconomic consequences.

Next Steps for SARS-CoV2/COVID-19 National and EU funded Research:
Sex as a biological variable needs to be integrated into research on SARS-CoV2 infection patterns, the development of the disease and COVID-19 treatments. COVID-19 pathology demonstrates sex differences in host susceptibility and clinical course. Including sex analysis in all reporting can offer new insights for the development of targeted therapies.

Sex needs to be recorded in all COVID-19 clinical trials. This should not be limited to balanced participant rates but, most importantly, should include sex-disaggregated reporting of response, side effects, dosage adaptations and long-term effects.

Approaches to prevention should be gender-sensitive to ensure broad adoption. SARS-CoV2 is projected to circulate in the general population for some time, and there is currently uncertainty about the extent and duration of immunity. Preventative measures, such as hand washing and the mandatory wearing of masks, should be implemented in a gender-sensitive fashion, and personal protective equipment used should be designed for a range of users. The development of digital preventative solutions should focus on gender preferences and barriers. Aspects relating to domestic and gender-based violence have been highlighted in the recent EUvsVirus hackathon and tandem Move It Forward for Women vs. COVID19 hackathon.

The gender dimensions of the outbreak in terms of unemployment, care duties and associated social inequity need to be considered for long-term management of the disease and for economic re-entry strategies. Gender impact assessments (see Method: Gender Impact Assessment) of proposed policies should be conducted. Adequate access to social, economic and health services needs to be ensured for all.



Works Cited

Borchgrevink, C. P., J. Cha & Kim, S. (2013), ‘Hand washing practices in a college town environment’, Journal of Environmental Health, 75(8), 18–24.

Bukowska, A., L. Spiller, C. Wolke, U. Lendeckel, S. Weinert, J. Hoffmann, P.

Bornfleth, I. Kutschka, A. Gardemann, B. Isermann & Goette, A. (2017). ‘Protective regulation of the ACE2/ACE gene expression by estrogen in human atrial tissue from elderly men’. Experimental Biology and Medicine (Maywood), 242(14), 1412–1423.

Doepke, M. & Tertilt, M. (2011). ‘Does Female Empowerment Promote Economic Development?’, Policy Research Working Paper – World Bank. https://doi.org/10.1596/1813-9450-5714

European Institute for Gender Equality. Frontline Workers (https://eige.europa.eu/covid-19-and-gender-equality/frontline-workers). GlobalHealth5050. (2020) (https://globalhealth5050.org/).

Guan, W. J., Z. Y. Ni, Y. Hu, W. H. Liang, C. Q. Ou, J. X. He, L. Liu, H. Shan, C. L. Lei, D. S. C. Hui, B. Du, L. J. Li, G. Zeng, K. Y. Yuen, R. C. Chen, C. L. Tang, T. Wang, P. Y. Chen, J. Xiang, S. Y. Li, J. L. Wang, Z. J. Liang, Y. X. Peng, L. Wei, Y. Liu, Y. H. Hu, P. Peng, J. M. Wang, J. Y. Liu, Z. Chen, G. Li, Z. J. Zheng, S. Q. Qiu, J. Luo, C. J. Ye, S. Y. Zhu, & Zhong, N. S., for the China Medical Treatment Expert Group (2020). ‘Clinical Characteristics of Coronavirus Disease 2019 in China’, New England Journal of Medicine, 382(18), 1708–1720.

International Labour Organization (2016). ‘Women at Work’,(https://www.ilo.org/gender/Informationresources/Publications/WCMS_457317/lang–en/index.htm).

Judah, G., R. Aunger, W. P. Schmidt, S. Michie, S. Granger & Curtis, V. (2009). ‘Experimental pretesting of hand-washing interventions in a natural setting’, American Journal of Public Health, 99 Suppl 2, S405–411.

Klein, S. L. & Flanagan, K. L. (2016).‘Sex differences in immune responses’, Nature Reviews Immunology, 16(10), 626–638.

Liu, Y., L. M. Yan, L. Wan, T. X. Xiang, A. Le, J. M. Liu, M. Peiris, L. L. M. Poon & Zhang, W. (2020). ‘Viral dynamics in mild and severe cases of COVID-19’, Lancet Infectious Diseases, 20, 656-657.

Obias-Manno, D., P. E. Scott, J. Kaczmarczyk, M. Miller, E. Pinnow, L. Lee-Bishop, M. Jones-London, K. Chapman, D. Kallgren & Uhl, K. (2007). ‘The Food and Drug Administration Office of Women’s Health: Impact of science on regulatory policy’, Journal of Womens Health, 16(6), 807–817.

Persampieri, L. (2019). ‘Gender and informed consent in clinical research: Beyond ethical challenges’, BioLaw Journal – Rivista di Biodiritto, (1), 65–87.

Seinfeld, S., J. Arroyo-Palacios, G. Iruretagoyena, R. Hortensius, L. E. Zapata, D. Borland, B. de Gelder, M. Slater & Sanchez-Vives, M. V. (2018). ‘Offenders become the victim in virtual reality: Impact of changing perspective in domestic violence’, Scientific Reports, 8(1), 2692.

Suen, L. K. P., Z. Y. Y. So, S. K. W. Yeung, K. Y. K. Lo & Lam, S. C. (2019). Epidemiological investigation on hand hygiene knowledge and behaviour: A cross-sectional study on gender disparity. e, 19(1), 401.

Sutton, E., M. Irvin, C. Zeigler, G. Lee & Park, A. (2014). ‘The ergonomics of women in surgery’, Surgical Endoscopy, 28(4), 1051–1055.

Szilagyi, L., T. Haidegger, A. Lehotsky, M. Nagy, E. A. Csonka, X. Sun, K. L. Ooi & Fisher, D. (2013), ‘A large-scale assessment of hand hygiene quality and the effectiveness of the WHO 6-steps. BMC Infectious Disease, 13, 249.

Tam, C. F., K. S. Cheung, S. Lam, A. Wong, A. Yung, M. Sze, Y. M. Lam, C. Chan, T. C. Tsang, M. Tsui, H. F. Tse & Siu, C. W. (2020). ‘Impact of Coronavirus Disease 2019 (COVID-19) Outbreak on ST-Segment-Elevation Myocardial Infarction Care in Hong Kong, China’, Circulation: Cardiovascular Quality and Outcomes, 13(4), e006631.

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Zeng, F., C. Dai, P. Cai, J. Wang, L. Xu, J. Li, G. Hu & L. Wang (2020). ‘A comparison study of SARS-CoV-2 IgG antibody between male and female COVID-19 patients: A possible reason underlying different outcome between gender’, medRxiv, https://www.medrxiv.org/content/10.1101/2020.03.26.20040709v1


COVID-19

The COVID-19 pandemic highlights the urgent need to incorporate sex and gender analysis into research.

Sex and gender differences can influence the body’s immune response (see chart). Biologically, females appear to produce more antibodies in response to infection or vaccination. The reasons may be hormonal, genetic, or related to differences in intestinal bacteria. The body's response may also vary in people undergoing hormonal therapy, either after menopause or to align their physical appearance with their gender identity.

sex and gender as possible modulators of Covid 19

Gendered divisions of labor can also create differences in infection rates. Women are more frequently employed in service professions, including healthcare. The WHO estimates that women represent between 65% and 86% of nurses worldwide. Women also perform the majority of caring duties in families and immediate communities. Personal protective equipment needs to consider gender-specific user preferences and anatomical differences across diverse users to ensure proper fit.

Gendered attitudes and behaviors also play a role. For example, smoking rates (higher in men), preventive measures such as hand washing (lower in men), and healthcare seeking (delayed in men) all contribute to higher risk in men.

Next Steps for SARS-CoV2/COVID-19 Research

  • 1. Sex as a biological variable needs to be integrated into research on SARS-CoV2 infection patterns, the development of the disease, and COVID-19 treatments.
  • 2. Sex needs to be recorded and analyzed in all COVID-19 clinical trials.
  • 3. Approaches to prevention should be gender-sensitive to ensure broad adoption. Digital preventive solutions should focus on gender preferences and barriers.
  • 4. The gender differences in terms of unemployment, care duties, and social inequities need to be considered for long-term management of the disease and for economic re-entry strategies.

 

 

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