It is true that the Occupational Safety and Health Administration requires employers to keep their environment's air at 19.5% oxygen or higher. But wearing face masks will not cause serious health effects, and they prevent the wearer from spreading the virus to others.
The COVID-19 virus alone is smaller than the N95 filter size. But the virus travels attached to larger particles consistently caught by the filter, and regardless of size, the erratic motion of particles — and the electrostatic attraction generated by the mask — means viruses get consistently caught, too.
Initial research — not yet peer-reviewed or FDA-approved — found electroceutical fabric is able to neutralize the virus after a minute of contact with the electrical field generated by the fabric.
There is no evidence that the general public will experience oxygen reduction significant enough to result in hypoxemia. Carbon dioxide can build up in face masks, but is unlikely that wearing a mask will cause hypercapnia, according to the CDC.
The CDC widely recommends cloth masks in public settings. The information stated on an old Texas medical center document in contradiction to that is outdated, though a real document.
An image showing top Democrats talking in close proximity with no masks is from December, months before the masks and social distancing became required in the U.S.
Our fact check work is supported in part by a grant from Facebook.
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A person wears a mask that reads "I CAN'T BREATHE" as demonstrators continue to protest the death of George Floyd on May 29, 2020 in Minneapolis, Minnesota.
A NASCAR official with a mask looks on prior to the NASCAR Cup Series The Real Heroes 400 at Darlington Raceway on May 17, 2020 in Darlington, South Carolina.
Vice President Mike Pence visits coronavirus survivor Dennis Nelson at the Mayo Clinic on April 28, 2020, in Rochester, Minnesota.
A masked Kevin Harvick celebrates in an empty victory lane after winning The Real Heroes 400, Sunday at Darlington Raceway.
In this Friday, May 22, 2020 photo, jockeys wearing face masks ride in the first horse race at Santa Anita Park in Arcadia, Calif. Horse racing returned to the track after being idled for one and a half months because of public health officials' concerns about the coronavirus pandemic. (AP Photo/Ashley Landis)
A woman wearing a face mask visits the Disneyland amusement park in Shanghai on May 11, 2020.
Ivanka Trump, first daughter and adviser to President Donald Trump, adjusts her mask after a tour at the distribution center of Coastal Sunbelt Produce May 15, 2020 in Laurel, Maryland.
Colorado Governor Jared Polis wears a face mask as President Donald Trump makes remarks during a meeting in the Cabinet Room of the White House, May 13, 2020 in Washington, DC.
Park Hyun-kyung wearing a face mask of South Korea holds the trophy after winning the KLPGA Championship at the Lakewood Country Club in Yangju, South Korea, Sunday, May 17, 2020. (AP Photo/Ahn Young-joon)
Wearing a face mask, Venezuelan soccer player María Alejandra Peraza, who played last season with Colombia's Millonarios women's team, trains alone at a park in Bogota, Colombia, Thursday, May 21, 2020. Peraza is one of hundreds of professional female players who have received a food package from the Ministry of Sport in Colombia during the lockdown to curb the COVID-19. (AP Photo/Fernando Vergara)
Hanwha Eagles players wear masks before the Korean Baseball Organization (KBO) League opening game.
A woman wears a face mask with the likeness of shooting victim Ahmaud Arbery printed on it during a rally on Friday May 8, 2020, to protest Arbery's killing.
Designer Julia Janus takes part in the "Mask Fashion Week" in Vilnius on May 5, 2020. Artists in Lithuania invited residents of the capital Vilnius to a "Mask Fashion Week", encouraging them to have fun wearing the now-mandatory facial accessory. Spearheading the initiative, designer Julia Janus said she hoped it would "encourage creativity" as well as compliance with orders to wear masks in public to help stem coronavirus infections.
Home plate umpire wears a mask during the Korean Baseball Organization (KBO) League opening game between.
Sen. Susan Collins, R-Maine, arrives wearing a protective mask at the top of a Senate Intelligence Committee nomination hearing for Rep. John Ratcliffe.
Jake Drollinger, left, and Heather Cha wear masks while walking in front of the Golden Gate Bridge in San Francisco on Sunday.
Ingrid Cosic, wearing a face mask with a skull pattern as she stands in front of an exhibit of 300 so-called plague masks, which were worn by doctors in the middle ages to protect against infection with the plague at the exhibition 'Plague - A Search for Clues at the LWL Museum of Archaeology in Herdecke, Germany, May 5, 2020. The special exhibition on the plague has been extended until Nov. 15 because of the coronavirus outbreak and the closing of the museum.
A man wears a mask as he waits in line outside the Warrensburg License Office in Missouri, a privately run facility that issues driver's licenses and vehicle registrations. The operation reopened Monday after being closed for about six weeks during stay-at-home orders.
A medical professional works at a drive-thru coronavirus testing site at Cambridge Health Alliance Somerville Hospital on April 28, 2020 in Somerville, Massachusetts. The city of Somerville is offering free testing to any resident who wants it, and requiring residents to wear masks in public spaces in order to combat the spread of coronavirus (COVID-19).
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Romy Humphries wears a face mask and face shield at SugarHouse Industries, March 26, 2020, in Midvale, Utah. SugarHouse Industries, a Utah company that usually manufactures boat tops and covers, has reconfigured its operation amid the spread of the coronavirus to produce face shields and masks.
Amid COVID-19 concerns, fast food worker Silay Penalosa wears a mask and Easter bunny ears as she carries an order to customer a waiting outside a Chick-fil-A restaurant in Dallas, Tuesday, April 7, 2020.
A woman uses a towel with a heart as a face mask rides a bicycle in the center of Amsterdam, Netherlands, April 5, 2020.
London Fashion Week continued Sunday with a number of unusual runway looks. Click through to see some of the Feb. 19 fashions, starting with this mask shown with the House of Mea collection.
In this May 13, 2020 photo, a pedestrian wears a face mask while carrying drinks from a nearby coffee shop along Larimer Street as businesses slowly re-open with the easing of restrictions to check the spread of the new coronavirus Wednesday in Denver.
Women in period dress and wearing face masks to protect against the new coronavirus walk outside the entrance to the Forbidden City in Beijing, Wednesday, May 27, 2020. The Chinese People's Political Consultative Conference concluded its session in Beijing on Wednesday, part of the annual meetings of China's two top legislative bodies.
Colombian Huitoto indigenous people pose wearing face masks, amid concerns of the COVID-19 coronavirus, in Leticia, department of Amazonas, Colombia on May 20, 2020.
Security personnel wearing face masks to protect against the new coronavirus stand in formation after the closing session of China's National People's Congress (NPC) at the Great Hall of the People in Beijing, Thursday, May 28, 2020. ChinaÕs legislature endorsed a national security law for Hong Kong on Thursday that has strained relations with the United States and Britain and prompted new protests in the territory.
A person wearing a protective face mask as a precaution against the coronavirus walks past shuttered businesses in Philadelphia on May 7.
A hairdresser wearing a face mask cuts the hair of a client at a hairdressing salon as Georgia continues to ease the restrictions aimed at stemming the spread of the COVID-19 coronavirus outbreak, on May 18, 2020 in Tbilisi. (Photo by VANO SHLAMOV/AFP via Getty Images)
Employee Emberly Kieffer sanitizes a gaming machine for patrons at the Thunderbird Casino for its soft reopening on Monday in Norman, Okla., on May 11, 2020. The casino is operating at a third of its capacity and spacing out machines six feet apart while implementing temp checks at the door and enforcing masks.
In this Friday, May 22, 2020 photo, a groom wearing a face mask leads a horse to the track at Santa Anita Park in Arcadia, Calif. Horse racing returned to the track after being idled for one and a half months because of public health officials' concerns about the coronavirus pandemic. (AP Photo/Ashley Landis)
Graduating senior Yasmine Protho, 18, wears a photo of herself and Class of 2020 on her protective mask amid the coronavirus pandemic as she graduates with only 9 other classmates at a time with limited family attending at Chattahoochee County High School on May 15, 2020, in Cusseta, Ga.
A vendor wearing a face mask amid concern over the spread of the COVID-19 coronavirus, waits for customers at a shop selling assorted headscarves ahead of Eid al-Fitr which marks the end of the Muslim holy month of Ramadan, as businesses have been allowed to reopen in Kuala Lumpur on May 21, 2020.
Wearing face masks to reduce the risk of spreading the novel coronavirus, a soldier from the 3rd Infantry Regiment, or the "Old Guard," works to place U.S. flags in front of every grave site ahead of the Memorial Day weekend in Arlington National Cemetery on May 21, 2020 in Arlington, Virginia. Traditionally known as "Flags-In," soldiers place small flags in front of more than 228,000 headstones and at the bottom of about 7,000 niche rows in the cemetery's Columbarium Courts and Niche Wall .
Marie, a 31-year-old owner of two fashions brands, sews homemade protective face masks to be distributed to people in need, at her home, in Maisons-Alfort, southeastern suburbs of Paris, on May 8, 2020, on the 53rd day of a strict lockdown in France to stop the spread of COVID-19 (novel coronavirus).
A man who declined to provide his name wears yellow caution tape as a mask during a protest in Texas on April 18, 2020.
Palestinian girls wearing protective masks attend a graduation ceremony from the Police Academy amid concerns about the spread of the coronavirus COVID-19 in Gaza City on May 7, 2020.
Democratic Congresswoman from New York Alexandria Ocasio-Cortez wears a face mask for protection against the coronavirus, during a press conference on April 14, 2020 in New York City.
Masked Wisconsin residents waiting in line to vote in Milwaukee on April 7, 2020.
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