SALT LAKE CITY (AP) — Utah launched a new cell phone app Wednesday to track coronavirus symptoms and identify people who may have been exposed, known as contact tracing.

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A sign reminds park-goers to practice social distancing during the coronavirus outbreak, at Liberty Park on Tuesday, April 21, 2020, in Salt Lake City. (AP Photo/Rick Bowmer)

The state has contract worth up to a $2.75 million with the social-media company Twenty, which makes an app that helps people use location data to find their friends to hang out.

The company used its technology to build an app called “Healthy Together” for the state. People who download the app will get daily reminders to self-report any symptoms, then be directed to testing if they’re at risk. If a case is confirmed, the app will use cellphone location data to trace back everyone they may have exposed to the virus, even those people who they don’t know or never spoke with.

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Utah Gov. Gary Herbert holds up the “Utah Leads Together Plan” while speaking during a press conference with legislative, community, and business leaders at the Utah State Capitol Friday, April 17, 2020, in the Salt Lake City. Utah is aiming to reopen restaurants and gyms and resume elective surgeries in early May under a plan to gradually reopen the economy that has been decimated by the coronavirus pandemic, Gov. Herbert said Friday. (Jeffrey D. Allred/Deseret News, via AP, Pool)

The approach is similar countries like South Korea, which used technology extensively to trace potential spread of the disease. Traditional contact tracing relies on people remembering who they have been in contact with, and requires a health-care worker to call each of those people and inform they about potential exposure.

Republican Gov. Gary Herbert said data privacy“of upmost concern.” People would have to opt-in, and location data will be deleted after 30 days, except in cases where there are legal requirements to keep it longer. Personally identifiable health data will also be deleted after 30 days, though data stripped of identifying information will be kept longer for COVID-19 efforts.

“I think this can help us, play a good healthy role in helping attack an enemy that is invisible,” Herbert said.

For most people, the coronavirus causes mild or moderate symptoms, such as fever and cough, that clear up in two to three weeks. But it can cause more severe illness, including pneumonia, and death for some people, especially older adults and people with existing health problems.

In other developments:

— Utah reported two more deaths due to the virus, both people over age 85. One was connected to a nursing-home outbreak, said state epidemiologist Angela Dunn.

— Weber, Morgan and Davis counties want to begin reopening restaurants, gyms and some other businesses starting May 1, with social distancing, cleaning and the use of masks.

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