Here’s the best way to double mask in 30 seconds flat (only one mask required)

United States

Do you want to double mask in a hurry? Do you want to do your best to ensure that you don’t catch COVID-19, pass it on to a vulnerable friend or relative? And would you rather not pay money on Amazon US:AMZN  for another face mask that could take weeks to arrive? Do you need to go to the supermarket in a hurry, but you don’t have a second mask?

Dr. Anthony Fauci, the director of the National Institute of Allergy and Infectious Diseases who is part of President Biden’s coronavirus task force, told NBC’s Today Show that he advocates double masking. “It just makes common sense that it likely would be more effective,” he said. “That’s the reason why you see people either double masking or doing a version of an N95.”

There is one quick option. Use a homemade balaclava mask over your existing mask to provide several extra layers of cotton. Ronit Bose Roy, a Mumbai-based Twitter US:TWTR  user whose near-330,000 followers include Salman Rushdie, showed the world how to fold a T-shirt into a face mask in 30 seconds. His video has received more than 1.9 million views.

Step 1: Pull the T-shirt over your head until the neck opening lines up with your nose.

Step 2: Fold the bottom of the shirt up once, and double-fold it down across your face.

Step 3: Criss-cross the back of the T-shirt once and pull up over the top of your head.

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The U.S. Centers for Disease Control and Prevention has not issued official guidance on double masking. It did not advocate wearing face coverings until April 3 last year to help prevent the wearer from spreading coronavirus, but since then health professionals say it also helps prevent the wearer from being infected.

Do masks work, even if you use thick cotton folded three times over your nose and mouth? Studies have concluded that face masks have helped reduce contagion by reducing droplets being sprayed into the air during flu season. Another Japanese-based study says this works when paired with vaccination, but a vaccine has not yet been approved for the virus that causes COVID-19.

As of Friday, COVID-19 had infected more than 101 million people worldwide, which mostly does not account for asymptomatic cases, one of the major ways in which the virus has spread around the world so quickly. The virus had killed nearly 2.2 million globally, including at least 435,452 in the U.S. The U.S. has the world’s highest number of COVID-19 cases (25.9 million).

Also see: CDC Director: ‘I can’t tell you how much vaccine we have and, if I can’t tell it to you, then I can’t tell it to the governors’

The Dow Jones Industrial Average US:DJIA, S&P 500 US:SPX  and Nasdaq Composite US:COMP  were lower Friday, amid concerns over the efficacy of new coronavirus vaccines against virus variants, reports showed that lockdown measures are taking an economic toll in Europe, and Biden’s proposed new round of fiscal stimulus running into opposition in the Senate.

Novavax US:NVAX  said late Thursday its vaccine candidate, which has a different mechanism to the ones already authorized in the U.S. — appears to be 89% effective, based on the early data from a U.K. trial involving 15,000 patients. However, the company said it did not work as well for the new variants circulating in the U.K. and South Africa.

BioNTech SE US:BNTX and Pfizer US:PFE vaccines showed 95% efficacy. Moderna US:MRNA  said its own candidate was 94% effective. A vaccine candidate from AstraZeneca US:AZN  and the University of Oxford also showed an average efficacy of 70% in a pooled analysis of interim data, according to a study published in December.