April 06, 2020
The Centers for Disease Control and Prevention has changed its policy and is now advising everyone, whether or not they have symptoms of COVID-19, to cover their face with a mask or cloth covering whenever social distancing is difficult to maintain. To be clear, the CDC is not saying you should wear a mask wherever you go, but rather in places where people congregate, including grocery stores and public transportation and ride-shares. The shift in recommendations reflects growing evidence that COVID-19 can be transmitted by a person’s exhalations and normal speech but also the fact that people are not effectively covering their sneezes and coughs. The stealth virusCOVID-19’s middle name should be “stealth.” People can be shedding virus for one to three days before showing any symptoms – including no coughing, sneezing or fever – in what’s called “presymptomatic transmission.” A Singapore study suggests that 10% of infections are attributable to presymptomatic spread. A study of the 3,711 passengers and crew on the Diamond Princess cruise ship indicates that close to 1 in 5 COVID-19 carriers never develop symptoms. Some these people transmit the virus through “asymptomatic transmission.” The proportion of infected people that never develop symptoms could be more like one-third for the general population that is younger and healthier than typical cruise takers. The virus’s ability to spread so easily from one person to the next is why people are being asked to physically distance themselves from one another. But people still have to go out to get essentials at places where people gather. If a person is not coughing or sneezing, how are they spreading the virus? One way is by contact. The virus lives on the mucous membranes in the throat and nose. With people touching their faces every two-and-a-half minutes, on average it’s easy to see how the virus gets on our hands, and then we can spread it to commonly used surfaces like door knobs, a plastic handle in the subway or someone else’s hand. Steel and plastic surfaces can harbor live virus for three days.The other manner of spread is by asymptomatic infected people simply breathing, talking, yelling or singing. These activities aerosolize virus, creating airborne virus particles – also called droplet nuclei – that are so tiny they can float around in the air for three hours. Coughing and sneezing produce larger water and virus-borne droplets, as well as producing aerosolized virus. Common medical devices, like nebulizer machines for people with asthma and CPAP machines for those with sleep apnea, can aerosolize virus. But the concentration of aerosolized virus will be small in a large well-ventilated space and practically absent outdoors. Infectious aerosolized virus becomes more of a concern in a place like a small, poorly ventilated room. Places like a patient’s bedroom in their home, some nursing home rooms and a classroom would all be concerning to me as a physician. Hospital rooms are generally better ventilated.Another key determinant of getting infected is the amount of time you are exposed – so your risk is much less with five minutes versus 30 or more minutes of exposure. People think about the danger of radiation exposure in very much the same way – how close you are to the source, the concentration of exposure and the amount of time you are exposed.
The CDC now recommends wearing a mask in some cases – a physician explains why and when to wear one
DIY and surgical masks may protect you and othersThe purpose of all of us wearing face coverings or surgical masks anywhere people congregate is first and foremost to protect others if we sneeze or cough. These coverings will stop much of the large droplets that could otherwise reach people as far away as 18 feet away. Just-published research indicates that surgical masks can also decrease the amount of aerosolized virus the people produce by breathing and talking. A big question is: Can these DIY or surgical masks also protect the wearer? The same research study shows these masks impede aerosolized virus being expelled out by the user so presumably they can decrease breathing in the virus as well. But they aren’t foolproof. These coverings don’t fit the face tightly, so aerosolized virus and larger droplets can be sucked in through the gaps between the face and the mask when we take a breath. Additionally, some of the viral particles are so small that they can be inhaled through the cloth or paper that’s used to make these masks. People should not be lulled into a false sense of security in thinking that these types of masks will protect them from airborne, aerosolized virus especially in poorly ventilated spaces frequented by others. The best thing to do is to either avoid such spaces or be in them for as short a period of time as possible. The bottom lineThe chance of catching COVID-19 from a person walking by outdoors is extremely small. Wearing face coverings is recommended and requested for when you are indoors, including mass transit and ride-shares, with other people. Anywhere you go, maintain physical distancing of at least 6 feet with no bodily contact. If someone nearby sneezes or coughs and they aren’t wearing a mask, get at least 20 feet away, quickly. When you do go out on an errand, wear a face covering and get your business done as fast as you can. You don’t need a N-95 mask if you wear a face covering when you go out in a public indoor place or ride mass transit and practice good physical distancing. Health care workers have to care for their COVID-19 patients within very close distances for prolonged periods of time. If they don’t have a N-95 mask, the risk goes way up for them. If you have a N-95 mask, please donate it to your local hospital or first responder.[You need to understand the coronavirus pandemic, and we can help. Read our newsletter.]This article is republished from The Conversation, a nonprofit news site dedicated to sharing ideas from academic experts.Read more: * Why wear face masks in public? Here’s what the research shows * The global effort to tackle the coronavirus face mask shortageThomas Perls does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.
Top news around the world
Coronavirus Disease

Coronavirus disease (COVID-19) is an infectious disease caused by a newly discovered coronavirus.

Most people infected with the COVID-19 virus will experience mild to moderate respiratory illness and recover without requiring special treatment. Older people, and those with underlying medical problems like cardiovascular disease, diabetes, chronic respiratory disease, and cancer are more likely to develop serious illness.

Around the World

Celebrity News

> Latest News in Media

Watch It
Ahmaud Arbery Family Lawyer Says D.A.'s, Cops Criminally Investigated by FBI
May 25, 2020
r64cdXzvsPA
'Floribama Shore' Kirk Medas Arrest Video, Do You Know Who I Am? | TMZ
May 24, 2020
Qrl7Iq3lBDM
Jamie Kennedy Explains How Stand-Up Comedy's Changed Amid Pandemic | TMZ
May 24, 2020
Q6SG4jcR6VI
Ayesha Curry's Jaw-Dropping Bikini Pics Taken By Steph Curry | E! News
May 24, 2020
JOxRMbPMajk
Best Moments From Iconic 2001 Film "Pearl Harbor": Rewind | E! News
May 25, 2020
dvDxM-leiqw
"Terrace House" Star Hana Kimura Dead at 22 After Cyberbullying | E! News
May 23, 2020
xqo43SIrfRs
Kylie Jenner, Britney Spears and Sofia Vergara show off backyard bikinis | Page Six Celebrity News
May 25, 2020
qrFbdCVexjk
Lori Loughlin, husband plead guilty in college admissions scandal | Page Six Celebrity News
May 22, 2020
3Tx-FvqZzVI
Celebrity breakups during quarantine: Megan Fox, Ashley Benson and more | Page Six Celebrity News
May 22, 2020
APr202A7bbQ
'Riverdale' Star Cole Sprouse on His Quarantine Mustache, 'Animal Crossing' and New Podcast
May 25, 2020
iN2edkR-OYM
Ben Platt on His Groundbreaking Radio City Music Hall Concert on Netflix
May 20, 2020
DXN5iMMfs60
Daveed Diggs On The Emotional Toll of Filming 'Snowpiercer' Stunts And The 'Hamilton' Movie
May 18, 2020
n17S9kH7XuA
TV Schedule
Late Night Show
Watch the latest shows of U.S. top comedians

Sports

Latest sport results, news, videos, interviews and comments
Latest Events
08
Mar
ITALY: Serie A
Juventus - Inter Milan
08
Mar
ENGLAND: Premier League
Manchester United - Manchester City
08
Mar
ENGLAND: Premier League
Chelsea - Everton
08
Mar
SPAIN: La Liga
Real Betis - Real Madrid
08
Mar
ITALY: Serie A
AC Milan - Genoa
07
Mar
ENGLAND: Premier League
Burnley - Tottenham Hotspur
07
Mar
ENGLAND: Premier League
Arsenal - West Ham United
07
Mar
SPAIN: La Liga
Barcelona - Real Sociedad
07
Mar
ENGLAND: Premier League
Liverpool - Bournemouth
07
Mar
SPAIN: La Liga
Atletico Madrid - Sevilla
01
Mar
SPAIN: La Liga
Real Madrid - Barcelona
01
Mar
ENGLAND: Premier League
Everton - Manchester United
01
Mar
ENGLAND: Premier League
Tottenham Hotspur - Wolves
01
Mar
SPAIN: La Liga
Espanyol - Atletico Madrid
01
Mar
ITALY: Serie A
Cagliari - Roma
29
Feb
ENGLAND: Premier League
Watford - Liverpool
29
Feb
ITALY: Serie A
Napoli - Torino
29
Feb
ENGLAND: Premier League
Bournemouth - Chelsea
24
Feb
ENGLAND: Premier League
Liverpool - West Ham United
23
Feb
ENGLAND: Premier League
Arsenal - Everton
23
Feb
ENGLAND: Premier League
Manchester United - Watford
23
Feb
ITALY: Serie A
Roma - Lecce
23
Feb
SPAIN: La Liga
Atletico Madrid - Villarreal
22
Feb
SPAIN: La Liga
Levante - Real Madrid
22
Feb
ITALY: Serie A
Fiorentina - AC Milan
22
Feb
ENGLAND: Premier League
Leicester City - Manchester City
22
Feb
ITALY: Serie A
Spal - Juventus
Find us on Instagram
at @feedimo to stay up to date with the latest.
Featured Video You Might Like
0vmRhiLHE2U JFCZUoa6MYE UfN5PCF5EUo 2PV55f3-UAg W3y9zuI_F64 -7qCxIccihU pQ9gcOoH9R8 g5MRDEXRk4k tudKp5Vhs3k iwWHibhssSo kQr0XHPbICM 5NeCb7JxaRk
Copyright © 2020 Feedimo. All Rights Reserved.