London Daily

Focus on the big picture.
Friday, Jun 20, 2025

CDC Says Double-Masking Offers More Protection Against The Coronavirus

CDC Says Double-Masking Offers More Protection Against The Coronavirus

New research found that wearing a cloth mask over a medical mask significantly boosts protection against droplets that can transmit the virus. Knotting the ear loops of surgical masks also helps.

The Centers for Disease Control and Prevention released new research on Wednesday that found wearing a cloth mask over a surgical mask offers more protection against the coronavirus, as does tying knots on the ear loops of surgical masks. Those findings prompted new guidance on how to improve mask fit at a time of concern over fast-spreading variants of the virus.

For optimal protection, the CDC says to make sure the mask fits snugly against your face and to choose a mask with at least two layers.

The Centers for Disease Control and Prevention released new research on Wednesday that found wearing a cloth mask over a medical mask is one way to reduce exposure to aerosol droplets that can transmit the coronavirus.


In laboratory testing, researchers simulated coughs and breathing and tested how well different masks worked to block aerosol particles — comparing no mask, a cloth mask or a surgical mask. They also tested two methods to optimize the fit of cloth and medical masks: wearing a cloth mask over a surgical mask, and tying knots on the ear loops of surgical masks and then tucking in and flattening the extra material against the face.

Both methods produced substantially improved protection against transmission of and exposure to infectious aerosols.

"In the study, wearing any type of mask performed significantly better than not wearing a mask," said CDC Director Rochelle Walensky in a briefing from the White House COVID-19 Response Team on Wednesday.

"And well-fitting masks provided the greatest performance at both blocking emitted aerosols and exposure of aerosols to the receiver. In the breathing experiment, having both the source and the receiver wear masks modified to fit better reduced the receiver's exposure by more than 95%, compared to no mask at all," she said.

The CDC compared the protection offered by (from left) an unknotted medical procedure mask, a cloth mask covering medical procedure mask, and medical procedure mask that is knotted and tucked.


Walensky said the laboratory findings underscore the importance of wearing a mask correctly and ensuring it fits snugly over your nose and mouth. The new information does not alter the CDC's guidance on who should wear a mask and when.

As of Feb. 2, masks are now required on planes, buses, trains and other public transportation traveling into, within or out of the U.S., as well as in U.S. transit hubs such as airports and stations.

The CDC's guidance on improving mask fit now recommends:

* Choosing a mask with a nose wire, which prevents air from leaking out along the top

* Using a mask fitter or brace over a disposable or cloth mask, to prevent air from leaking out. These small, reusable devices cinch a cloth or medical mask to create a tighter fit and improve mask performance, Walensky said.

* Make sure your mask fits snugly over your nose, mouth and chin: "If the mask has a good fit, you will feel warm air come through the front of the mask and may be able to see the mask material move in and out with each breath," the CDC says.

* Add layers of material – either by using cloth mask with multiple layers of fabric or by wearing a disposable mask under a cloth mask.

But double-masking isn't recommended for all masks. Don't combine two disposable masks, the CDC says: "Disposable masks are not designed to fit tightly and wearing more than one will not improve fit."

And don't layer another mask on top of a KN95, either. That mask should be used alone, the CDC says.


Comments

Mike 4 year ago
Stop breathing completely and close your eyes and after 2 minutes you don't need a mask anymore because you will be dead.
Oh ya 4 year ago
If your really worried go with a plastic bag tied tight around neck otherwise you have a 99.7%chance of living

Newsletter

Related Articles

0:00
0:00
Close
16 Billion Login Credentials Leaked in Unprecedented Cybersecurity Breach
Senate hearing on who was 'really running' Biden White House kicks off
Iranian Military Officers Reportedly Seek Contact with Reza Pahlavi, Signal Intent to Defect
FBI and Senate Investigate Allegations of Chinese Plot to Influence the 2020 Election in Biden’s Favor Using Fake U.S. Driver’s Licenses
Vietnam Emerges as Luxury Yacht Destination for Ultra‑Rich
Plans to Sell Dutch Embassy in Bangkok Face Local Opposition
China's Iranian Oil Imports Face Disruption Amid Escalating Middle East Tensions
Trump's $5 Million 'Trump Card' Visa Program Draws Nearly 70,000 Applicants
DGCA Finds No Major Safety Concerns in Air India's Boeing 787 Fleet
Airlines Reroute Flights Amid Expanding Middle East Conflict Zones
Elon Musk's xAI Seeks $9.3 Billion in Funding Amid AI Expansion
Trump Demands Iran's Unconditional Surrender Amid Escalating Conflict
Israeli Airstrike Targets Iranian State TV in Central Tehran
President Trump is leaving the G7 summit early and has ordered the National Security Council to the Situation Room
Taiwan Imposes Export Ban on Chips to Huawei and SMIC
Israel has just announced plans to strike Tehran again, and in response, Trump has urged people to evacuate
Netanyahu Signals Potential Regime Change in Iran
Juncker Criticizes EU Inaction on Trump Tariffs
EU Proposes Ban on New Russian Gas Contracts
Analysts Warn Iran May Resort to Unconventional Warfare
Iranian Regime Faces Existential Threat Amid Conflict
Energy Infrastructure Becomes War Zone in Middle East
UK Home Secretary Apologizes Over Child Grooming Failures
Trump Organization Launches 5G Mobile Network and Golden Handset
Towcester Hosts 2025 English Greyhound Derby Amid Industry Scrutiny
Gary Oldman and David Beckham Knighted in King's Birthday Honours
Over 30,000 Lightning Strikes Recorded Across UK During Overnight Storms
Princess of Wales Returns to Public Duties at Trooping the Colour
Red Arrows Use Sustainable Fuel in Historic Trooping the Colour Flypast
Former Welsh First Minister Addresses Unionist Concerns Over Irish Language
Iran Signals Openness to Nuclear Negotiations Amid Ongoing Regional Tensions
France Bars Israeli Arms Companies from Paris Defense Expo
King Charles Leads Tribute to Air India Crash Victims at Trooping the Colour
Jack Pitchford Embarks on 200-Mile Walk to Support Stem Cell Charity
Surrey Hikers Take on Challenge of Climbing 11 Peaks in a Single Day
UK Deploys RAF Jets to Middle East Amid Israel-Iran Tensions
Two Skydivers Die in 'Tragic Accident' at Devon Airfield
Sainsbury's and Morrisons Accused of Displaying Prohibited Tobacco Ads
UK Launches National Inquiry into Grooming Gangs
Families Seek Closure After Air India Crash
Gold Emerges as Global Safe Haven Amid Uncertainty
Trump Reports $57 Million Earnings from Crypto Venture
Trump's Military Parade Sparks Concerns Over Authoritarianism
Nationwide 'No Kings' Protests Challenge Trump's Leadership
UK Deploys Jets to Middle East Amid Rising Tensions
Trump's Anti-War Stance Tested Amid Israel-Iran Conflict
Germany Holds First Veterans Celebration Since WWII
U.S. Health Secretary Dismisses CDC Vaccine Advisory Committee
Minnesota Lawmaker Melissa Hortman and Husband Killed in Targeted Attack; Senator John Hoffman and Wife Injured
Exiled Iranian Prince Reza Pahlavi Urges Overthrow of Khamenei Regime
×