According to researchers, the best design was that of a double-layer mask made of heavyweight “quilter’s cotton,” consisting of a thread count of 180 or more.
Global cases of the novel coronavirus surpassed 5 million early Thursday, nearly five months after the first infection was reported in the Chinese city of Wuhan.
The virus has now spread to more people in under six months than the total number of severe flu cases each year, which is estimated to infect about three to five million globally, according to the World Health Organization (WHO).
The U.S. has recorded the most COVID-19 cases, with more than 1,551,853 total infections and at least 93,439 deaths from the virus. RELATED: CoronavirusNOW.com, FOX launches national hub for COVID-19