DALLAS (NEXSTAR) A Harvard researcher believes skin rashes could be a new symptom of COVID-19.

Andrew Chan, a professor of immunology and infectious disease at the Harvard T.H. Chan School of Public Health, has been tracking coronavirus patients using the COVID Symptom Study app. He says the app is picking up more cases of raised skin bumps and inflammation on fingers and toes.

The rashes were placed into three categories:

Chans research focused on rashes involved roughly 336,000 app users in the United Kingdom.

Similarly, an early study on COVID found 17 percent of the 11,546 people surveyed had a rash as their first COVID-19 symptom. Of those who reported suffering from a rash, 21 percent said it was their only symptom.

Even though skin rashes may not be that common in COVID, the fact that they do arise, the fact that they may be a more specific sign, highlight how important it is to really assess their prevalence and how predictive they are, Chan said in an interview with VOX.

As of now, rashes arent listed as a coronavirus symptom by the Centers for Disease Control and Prevention. The CDC-approved symptoms are:

The CDC notes the above list does not include all symptoms and symptoms may appear2-14 days after exposureto the virus.

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Researcher: This new symptom could be a key indicator of COVID-19 - WANE