A string of robberies that have featured suspects wearing medical masks have taken place across the country in recent weeks, though all seem to be unrelated.

The Atlanta suburb of Smyrna has been plagued by a serial bank robber who robbed two banks there late last month. The man wore a medical mask both times.

Last Saturday, two gunmen wearing masks jumped a group of workers transporting $200,000 in cash at Aqueduct Racetrack in Queens, New York.

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On Wednesday, a man in Boston robbed a bank while wearing a surgical mask, and on Friday, the same thing happened in New Jersey.

This isn't the first time surgical masks have been used in robberies; in the fall there was a series of five robberies in Austin, Texas featuring a suspect who wore a medical mask.

The masks, used widely by doctors and medical professionals, have become commonplace in public due to the spread of the coronavirus throughout the U.S. Despite through the roof demand for the masks, Surgeon General Jerome Adams Jerome AdamsTop health officials pledge to keep politics out of COVID-19 vaccine process The Hill's 12:30 Report — Presented by Facebook — Trump, Biden duel in final stretch | Vaccine trial on pause after recipient's 'potentially unexplained illness' | Biden visits Michigan | Trump campaign has 18 events in 11 states planned in the next week Watch live: Senate hearing on vaccines MORE urged Americans at the beginning of the month to stop buying them, saying that they are, in fact, ineffective in stopping the spread of coronavirus.

"If healthcare providers can’t get them to care for sick patients, it puts them and our communities at risk!” Adams said in a tweet.

Seriously people- STOP BUYING MASKS!



They are NOT effective in preventing general public from catching #Coronavirus, but if healthcare providers can’t get them to care for sick patients, it puts them and our communities at risk!

https://t.co/UxZRwxxKL9 — U.S. Surgeon General (@Surgeon_General) February 29, 2020

The Centers for Disease Control and Prevention does not recommend that healthy people wear medical masks to protect themselves from respiratory diseases, including coronavirus. The agency says that people who show COVID-19 symptoms should wear masks to help prevent the spread of the disease, but added that medical masks are "crucial" for healthcare workers and people who are taking care of someone at home or in a healthcare facility.