The Centres for Disease Control and Prevention doesn't list hair loss as a symptom of COVID-19, but some doctors have noticed the condition among their patients.

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"It tends to be in people who have pretty severe cases that we've seen it," Dr Nate Favini, the medical lead at Forward, a primary-care practice that's collecting data on coronavirus patients around the country, told Business Insider.

Favini said coronavirus patients may suffer from telogen effluvium, a condition that leads hair to stop growing and eventually fall out roughly three months after a traumatic event. Whereas the average healthy person loses about 100 strands of hair per day, people with telogen effluvium may lose about three times that.