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Employers Rush to Adopt Virus Screening. The Tools May Not Help Much.

Bob Grewal recently began testing a new health-screening setup for workers at a Subway restaurant he owns in Los Angeles near the University of Southern California.

When he stepped inside the employee food prep area, a fever-detection and facial recognition camera service, PopID, quickly identified him by name and gauged his temperature. Then a small tablet screen underneath the camera posted a message that cleared him to enter.

“Thank you Bob, you have a healthy Temp. of 98.06,” the screen said. “PopID aims to create a safe environment and stop the spread of Covid-19.”

Mr. Grewal is one of many business leaders racing to deploy new employee health-tracking technologies in an effort to reopen the economy and make it safer for tens of millions of Americans to return to their jobs in factories, offices and stores. Some employers are requiring workers to fill out virus-screening questionnaires or asking them to try out social-distancing wristbands that vibrate if they get too close to each other. Some even hope to soon issue digital “immunity” badges to employees who have developed coronavirus antibodies, marking them as safe to return to work.

But as intensified workplace surveillance becomes the new normal, it comes with a hitch: The technology may not do much to keep people safer.

Public health experts and bioethicists said it was important for employers to find ways to protect their workers during the pandemic. But they cautioned there was little evidence to suggest that the new tools could accurately determine employees’ health status or contain virus outbreaks, even as they enabled companies to amass private health details on their workers.

ImageA worker at a Subway in Los Angeles having his temperature taken by PopID.
Credit…Tag Christof for The New York Times

“I think employers need to look carefully before they jump into any of this,” said Michael T. Osterholm, the director of the Center for Infectious Disease Research and Policy at the University of Minnesota. “Some companies are embarking upon things that are not going to help and may actually set us back.”

Over the past month, companies have started marketing a slew of employee-tracking tools to combat the virus.

PwC, the financial services firm, has developed a contact-tracing app to help employers “provide a lower-risk workplace for employees.It will automatically log proximity between employees and can be used to help identify people who may have been exposed to the virus at work.

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Salesforce, the giant software company, is offering a new tool,, to help employers “safely reopen.” Among other things, it will enable companies to create online employee health surveys and map the workplace locations visited by employees with coronavirus infections.

Credit…Tag Christof for The New York Times

Clear, a security company that uses biometric technology to verify people’s identities at airports and elsewhere, plans this week to start marketing a health-screening service that can be used use to vet and clear employees to enter workplaces. The service will take employees’ temperatures with a thermal camera, as well as verify the results of their medical tests for the virus, sharing the results with employers as color-coded scores like green or red.

Caryn Seidman-Becker, the chief executive of Clear, compared her company’s multilevel health-screening approach to airport security checks where a person who sets off a metal detector gets a pat-down.

“Nothing is foolproof,” Ms. Seidman-Becker said. “It’s putting them together that allows you to buy down risk and increase confidence.”

Companies are adopting new employee-tracking technologies partly in response to White House guidelines asking employers to monitor their “work force for indicative symptoms” and prohibit employees with symptoms from returning to workplaces unless a health provider has cleared them.

Yet many of the tools — including certain infrared thermometers and antibody tests that would be needed for employee “immunity” certificates — can be wildly inaccurate. Public health experts said the tools could create a false sense of security, leading workers to spread the virus inadvertently.


Fever-screening devices, for example, could miss many of the up to one-quarter or more people infected with the virus who do not exhibit symptoms. Or they could inadvertently expose employees who are running higher temperatures because they are under stress or have other health conditions, issues the workers may have preferred to keep private.

Some law professors and bioethicists also warned that the idea of immunity certificates threatened to create a new class system for employment — one that could unfairly prevent certain people from working just because they had never contracted the virus.

“Do we really want a world where some people can go to work and others can’t based on their immunity status?” said Hank Greely, a professor at Stanford Law School who studies the social implications of new health technologies. “The people who can’t will say, ‘This is unfair,’ and they’ll be right.”

He and other experts said companies would be better off investing in a proven health intervention — lab testing for coronavirus — for their employees rather than shiny, new surveillance technologies.

Gabrielle Rejouis, a workers’ rights advocate at the Center on Privacy and Technology at Georgetown Law, said employers should be “providing free testing for their workers if they’re expecting them to come into work, and also making sure that they are paying sick leave and appropriate health benefits to make sure that workers aren’t coming to work sick and infecting their co-workers.”

Many of the worker-screening tools are being introduced with minimal government oversight — and with few details for employees about how companies are using and safeguarding their health data, or how long they plan to keep it.

To support emergency responses to the pandemic, the Food and Drug Administration is temporarily allowing companies to market infrared thermal camera systems that have not been vetted by health regulators for temperature checks in places like warehouses and factories. Similarly, the Equal Employment Opportunity Commission, which enforces antidiscrimination rules that generally prohibit employers from requiring employees to undergo medical exams, said in March that, given the coronavirus threat, employers may measure employees’ temperatures.

Credit…Tag Christof for The New York Times

The federal law on patient privacy, the Health Insurance Portability and Accountability Act or HIPAA, also puts few restrictions on employers. Although the law protects employee health information collected by an employer for company-sponsored group health plans, it generally does not protect employee health data collected for other purposes, legal experts said.

As a result, companies are forging their own approaches to health-screening accuracy and privacy.

Some restaurants and warehouses, for instance, are using hand-held infrared devices to assess workers’ temperatures. PopID, the restaurant technology company behind the temperature-scanning system that Mr. Grewal is trying at his Subway franchises, uses wall-mounted thermal-imaging cameras that employees stop in front of for temperature checks.

The system records the date, time, employee name and temperature, creating a historical log for employers who want to check on worker compliance. Employers can choose to keep or delete that data.

“The decision to test temperature at a lot of these places has already been made,” said John Miller, the chief executive of the Cali Group, the parent company of PopID. “We’re just providing a better way to do it.”

PopID is also being used by some Taco Bell franchises, assisted living facilities and Lemonade, a California restaurant chain.

Mr. Grewal, whose family owns more than 50 Subway franchises, said he did not expect the temperature-scanning system to be a panacea. He simply views it as a tool to help employers better protect their workers and make consumers feel safer — much like the plexiglass he has installed to separate customers placing takeout orders from employees filling them, he said.

Credit…Tag Christof for The New York Times

As part of the pilot test, he has asked employees to scan their temperatures four times a day — at the beginning and end of their work shifts, and before and after their break. The employee data is deleted every 30 days.

“People are going to adjust,” Mr. Grewal said. “They’re going to have to understand all the safety precautions that chains have taken.”

Even so, civil liberties experts said it was important for any virus-tracking of employees to be voluntary. Otherwise, by linking identification technologies like facial recognition to employees’ health status, employers could usher in an authoritarian, China-like system of surveillance and social control at workplaces.

“We are accepting encroachments on privacy here that we would not normally accept,” said Jay Stanley, a senior policy analyst at the American Civil Liberties Union. “We need to be vigilant to make sure that they don’t outlast this crisis.”

Four Republican senators recently said they would introduce a Covid-19 privacy bill to hold businesses accountable when they use people’s heath information to fight the pandemic.

As least for now, increased tracking and screening seem poised to become a fact of daily life not just for workers but also for consumers.

Clear, the biometric security company, already operates at sports arenas where fans can use their digital identities and faces to speed through fast-lane security checks. Now, said Ms. Seidman-Becker, Clear’s chief executive, restaurant groups, big-box retailers, sports teams, airlines and cruise ships are considering using Clear Health Pass, the company’s new identity verification and health-screening system, for both employees and customers.

“I really do think that this is ubiquitous,” she said.