Is coronavirus airborne? Will it survive for hours or days on bathroom surfaces? Are men more at risk? Burning questions about COVID-19

There are some outlandish rumors about COVID-19, the disease caused by the new virus SARS-CoV-2, percolating on the internet: To some, it’s a dastardly bioweapon designed to wreak economic armageddon on the West; a left-wing conspiracy to damage the reelection prospects of President Trump; a virus that leaked from a Wuhan laboratory.

Such paranoid speculation is at the very least unhelpful, health professionals say, and only serves to politicize a global public-health emergency and distract from potentially life-saving measures to contain and/or slow the spread of coronavirus. After reportedly jumping from animals to humans at a food market in Wuhan, China in early December or before, it has already reached at least 118 countries or territories. It’s a highly contagious and sometimes deadly disease.


Conspiracy theories politicize a public-health emergency and distract from potentially life-saving measures.



As the world struggles to come to terms with the prospect of COVID-19 changing the way we socialize and work, people are left wondering whether the financial markets have had a massive overreaction to yet another virus that will eventually fizzle out, or whether it’s time to buckle down and heed warnings of the disease’s seriousness issued by governments and health authorities.

Here, MarketWatch breaks down the facts and fiction of the global pandemic:

Is coronavirus airborne like measles?

The jury is out. As of Friday, it did not appear to be an airborne virus in the same vein as measles or chickenpox, said Luis Ostrosky, a professor and vice chairman of internal medicine at McGovern Medical School in Houston, Texas. “It’s a virus that travels in droplets. This is very good news. With an airborne virus, one person could infect the whole room.”

Now for the bad news: Airborne transmission is “plausible,” according to a study (that has not been peer reviewed) posted online this week from scientists at Princeton University, the University of California, Los Angeles and the National Institutes of Health. The researchers concluded that the virus could remain airborne for “up to 3 hours post aerosolization.”

In the meantime, officials recommend “social distancing” in public spaces. “You would need to touch contaminated secretions to become infected, or to be within six feet of a sick person who is coughing or sneezing,” Ostrosky said. “Studies have looked at how far spit and little droplets fly, and that’s the magic number.” Meeting in outdoor spaces, in theory, could give the virus less of a chance to spread.

How long can it live in your bathroom?

“It’s not certain how long the virus that causes Coronavirus survives on surfaces, but it seems to behave like other coronaviruses,” the World Health Organization said. “Studies suggest that coronaviruses — including preliminary information on the COVID-19 virus — may persist on surfaces for a few hours or up to several days.” Higher temperatures, based on earlier coronaviruses, are likely to degrade it — but experts caution this novel coronavirus may not necessarily go away in warmer weather.

Its life span will also vary, depending on the type of surface, temperature and/or humidity. Bathrooms are a welcoming environment for coronaviruses. “Previous coronaviruses can remain viable in cold, moist surfaces up to nine days,” Ostrosky said. So if you are sharing a home with someone who has coronavirus, he strongly advises against sharing the same bathroom.

Recommended: Italians struggle to adjust to the New Normal amid nationwide coronavirus lockdown



Associated Press


President Trump speaks in an address to the nation from the Oval Office at the White House on Wednesday. He announced a suspension in travel from Europe to the U.S.

Will recirculated air on a plane make me sick?

In-flight oxygen is probably of higher quality than the air in your home. “If you have an infected person in the front of the plane, and you’re in the back of the plane, your risk is close to zero simply because the area of exposure is thought to be roughly six feet from the infected person,” according to Charles Chiu, professor of laboratory medicine at University of California, San Francisco.

“Ventilation rates provide a total change of air 20 to 30 times per hour,” the WHO says. “Most modern aircraft have recirculation systems, which recycle up to 50% of cabin air. The recirculated air is usually passed through HEPA (high-efficiency particulate air) filters, of the type used in hospital operating theatres and intensive care units, which trap dust particles, bacteria, fungi and viruses.”

President Trump said Wednesday he was “marshaling the full power of the federal government” by suspending travel from Europe to the U.S. for 30 days from midnight Friday, a measure aimed at stopping sick people traveling and spreading COVID-19. “We made a lifesaving move with early action on China. Now we must take the same action with Europe,” he said. The restrictions won’t apply to the U.K.

Also see: U.S. State Department warns passengers NOT to go on cruises — says there’s ‘increased risk of infection’ on cruise ships

Are men more affected by this than women?

“Men do tend to be more affected than women and their symptoms are often more severe,” Ostrosky said. “Estrogen has a protective effect. When scientists block estrogen production in animals, they become more susceptible to coronaviruses and they get worse symptoms.” He added, “But please don’t take estrogen injections or pills. If you are a man, they will not help you.”

Italy was the worst nationwide outbreak after China, and recorded an even more dramatic gender difference. The average age of those who have died from COVID-19 in Italy is 80.3 years old, and only 25.8% are women, according to Silvio Brusaferro, legal representative at the Istituto Superiore di Sanità.

Is there a gender difference when it comes to influenza? “No, with the flu it’s pretty even,” he said. The two illnesses have similar symptoms, including a sore throat and coughing, but they have other characteristics that set them apart. Coronavirus is a type of virus common in humans and animals, and causes mild-to-moderate respiratory illnesses. But it can travel through your body and damage other organs.



MarketWatch photo illustration/iStockphoto


‘Most face masks do not effectively filter small particles from the air and don’t prevent leakage around the edge of the mask when the user inhales,’ the CDC says.

Do face masks guard against coronavirus?

Face masks help prevent patients from spreading the virus, but they don’t protect the healthy, the Centers for Disease Control and Prevention say. They can help act as a barrier if a sick person coughs or sneezes. “Most face masks do not effectively filter small particles from the air and don’t prevent leakage around the edge of the mask when the user inhales,” the CDC adds.

What’s more, face masks are needed for health-care professionals. N95 masks are tighter-fitting than surgical masks and protect against small particles and large droplets, according to the CDC. Health and Human Services Secretary Alex Azar said that there are only 30 million N95 masks in the national stockpile, and “as many as 300 million masks are needed in the U.S. for health-care workers.”

Should I cancel my movie and dinner date?

Whether you’re on a plane or a train, you are at risk of contracting coronavirus, especially if you are seated near an infected person who coughs or sneezes and/or you touch a contaminated surface and then your face without properly washing your hands. The WHO says there’s no difference between sitting in a restaurant, office or movie theater: If you’re near an infected person, you’re at risk.

While you can’t do much about being seated next to an infected passenger on a plane at 30,000 feet, you can exercise responsible “social distancing,” Ostrosky said. “The more people who are in that enclosed space with you, the higher the risk you have of being exposed to someone who is sick,” he added. “If we had to rank them, there is an increased risk in larger groups.”

On Sunday evening, New York Mayor Bill de Blasio said he would shut down all bars, restaurants and cinemas to help contain the spread of virus. “We cannot control the supply chain, we cannot control the foundation of where our medical supplies and equipment come from,” de Blasio told CNN. “The only hope is the federal government actually wakes up and realizes we are in a war.”

Wasn’t coronavirus already a pandemic?

Not technically. The WHO only declared COVID-19 a global pandemic on Wednesday. An outbreak is deemed to have become a pandemic when it has spread from human-to-human on several continents, while an epidemic is a disease that infects regions or a community over a large geographical area. “We’re deeply concerned,” WHO head Tedros Adhanom Ghebreyesus told reporters.

But wasn’t coronavirus already a pandemic, given that it had reached up to 100 countries by that time? Not quite. There’s subjectivity involved in designating an epidemic a pandemic, and epidemiologists finally agreed that the efforts to contain the virus had failed. In other words, it’s now a matter of containing the spread and slowing it down to give scientists time to work on a vaccine.

As of Sunday evening, there were 169,387 confirmed cases globally and 6,513 deaths, according to data the latest rally from the database of Johns Hopkins University’s Center for Systems Science and Engineering; the database also reported 77,257 recoveries. The U.S. has had at least 3,774 confirmed coronavirus cases and 69 deaths.

How COVID-19 is transmitted








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