This shows people sneezing.
More than 70% of the participants reported covering up their symptoms. Credit: Neuroscience News

People Likely to Conceal Contagious Sickness for Social Commitments

Summary: A significant number of people, including healthcare workers, conceal infectious illnesses to maintain their work and social commitments. The study, involving over 4,100 participants, found that 75% had hidden or might hide their illness in the future, often due to social plans or institutional pressures.

Despite the potential harm to others, actively sick individuals frequently reported concealing illnesses of varying severity and transmissibility. This research highlights a critical public health issue, underscoring the need for solutions beyond individual responsibility.

Key Facts:

  1. 75% of participants admitted to hiding or considering hiding an infectious illness in various social contexts.
  2. More than 61% of healthcare workers confessed to concealing their illness.
  3. The study suggests a discrepancy between how people predict they would act when sick and their actual behavior, with many downplaying the severity and transmissibility of their illness.

Source: APS

A startling number of people conceal an infectious illness to avoid missing work, travel, or social events, new research at the University of Michigan suggests.

The findings are reported in Psychological Science, a journal of the Association for Psychological Science.

Across a series of studies involving healthy and sick adults, 75% of the 4,110 participants said they had either hidden an infectious illness from others at least once or might do so in the future. Many participants reported boarding planes, going on dates, and engaging in other social interactions while secretly sick. More than 61% of healthcare workers participating in the study also said they had concealed an infectious illness.

Interestingly, the researchers found a difference between how people believe they would act when ill and how they actually behave, said Wilson N. Merrell, a doctoral candidate and lead author on the study.

“Healthy people forecasted that they would be unlikely to hide harmful illnesses—those that spread easily and have severe symptoms—but actively sick people reported high levels of concealment regardless of how harmful their illness was to others,” Merrell said.                                                                                                                                     

In the first study, Merrell and his colleagues—psychology professor Joshua M. Ackerman and PhD student Soyeon Choi—recruited 399 university healthcare employees and 505 students. The participants reported the number of days they felt symptoms of an infectious illness, starting in March 2020, when the COVID-19 pandemic began.

They then rated how often they actively covered up symptoms from others, came to campus or work without telling others they were feeling ill, or falsified mandatory symptom screeners that the university had required for anyone using campus facilities.

More than 70% of the participants reported covering up their symptoms. Many said they hid their illness because it would conflict with social plans, while a small percentage of participants cited pressure from institutional policies (e.g., lack of paid time off). Only five participants reported hiding a COVID-19 infection.

In a second study, the researchers recruited 946 participants online and randomly assigned them to one of nine conditions in which they imagined being either moderately or severely sick while in a social situation.

In each condition, the risk of spreading the illness was designated as low, medium, or high. (To control for the special stigma associated with COVID-19 at the time, the researchers asked participants not to imagine being sick with that disease.) Participants were most likely to envision themselves hiding their sickness when symptom severity was low, and least likely to conceal when symptoms were severe and highly communicable.

In another study, Merrell and colleagues used an online research tool to recruit 900 people—

including some who were actively sick—and asked them to rate the transmissibility of their real or imagined illness. The participants were also asked to rate their likelihood of covering up an illness in a hypothetical meeting with another person.

Results showed that compared to healthy participants who only imagined being sick, those who were actively ill were more likely to conceal their illness regardless of its transmissibility.  

“This suggests that sick people and healthy people evaluate the consequences of concealment in different ways,” Merrell said, “with sick people being relatively insensitive to how spreadable and severe their illness may be for others.”

The COVID-19 crisis may have shaped the way the participants thought about concealing an illness, Merrell said, adding that future research could explore how ecological factors (e.g., pandemics) and medical advances such as vaccines influence people’s disease-related behavior. The research team is also expanding this line of investigation to other countries to uncover potential cultural differences in concealment behaviors, he said.

Overall, the findings carry significant public health implications, illuminating the motivations and tradeoffs we make in social interactions when we’re sick, Merrell added. 

“After all, people tend to react negatively to, find less attractive, and steer clear of people who are sick with infectious illness,” he said. “It therefore makes sense that we may take steps to cover up our sickness in social situations. This suggests that solutions to the problem of disease concealment may need to rely on more than just individual good will.”

About this social neuroscience research news

Author: Scott Sleek
Source: APS
Contact: Scott Sleek – APS
Image: The image is credited to Neuroscience News

Original Research: Closed access.
When and Why People Conceal Infectious Disease” by Wilson N. Merrell et al. Psychological Science


When and Why People Conceal Infectious Disease

People sick with infectious illnesses face negative social outcomes, like exclusion, and may take steps to conceal their illnesses from others. In 10 studies of past, current, and projected illness, we examined the prevalence and predictors of infection concealment in adult samples of U.S. university students, health-care employees, and online crowdsourced workers (total N = 4,110). About 75% reported concealing illness in interpersonal interactions, possibly placing others in harm’s way.

Concealment motives were largely social (e.g., wanting to attend events like parties) and achievement oriented (e.g., completing work objectives). Disease characteristics, including potential harm and illness immediacy, also influenced concealment decisions.

People imagining harmful (vs. mild) infections concealed illness less frequently, whereas participants who were actually sick concealed frequently regardless of illness harm, suggesting state-specific biases underlying concealment decisions.

Disease concealment appears to be a widely prevalent behavior by which concealers trade off risks to others in favor of their own goals, creating potentially important public-health consequences.

Join our Newsletter
I agree to have my personal information transferred to AWeber for Neuroscience Newsletter ( more information )
Sign up to receive our recent neuroscience headlines and summaries sent to your email once a day, totally free.
We hate spam and only use your email to contact you about newsletters. You can cancel your subscription any time.