How to Identify the Different Symptoms of the Flu and Covid-19

As influenza season approaches, some Americans, and particularly dad and mom, are frightened that, in the event that they or their kids ought to turn into sick, it is probably not simple to know which illness they’ve — the flu or Covid-19.

They are right. Most signs of the two illnesses are so comparable that, brief of a take a look at — or two or three assessments — it gained’t be attainable to know for positive. But there are some clues. (And it’s attainable to have each infections at the identical time; some sufferers in China this yr had been discovered to have each.)

It isn’t but clear whether or not the United States could have a lot of a flu season this yr. Flu exercise in the Southern Hemisphere, which is commonly predictive of exercise in the United States, was 99 % under regular throughout its winter. Epidemiologists consider that’s as a result of Australians, New Zealanders, South Africans, Chileans and different residents of the southern half of the globe had been sporting masks, staying a number of ft aside and washing their arms to stop transmission of the coronavirus. Those identical precautions additionally stop flu transmission.

Because there are only a few flights between the Southern Hemisphere and the United States proper now, there could also be no alternative for the normal 4 seasonal influenza strains to “reseed” themselves amongst Americans. If they do, masks and social distancing ought to restrict their unfold.

Nonetheless, specialists urge all Americans to get flu pictures. Before it ended abruptly throughout lockdown, final yr’s flu season was on monitor to be one of the worst in recent memory. The number of children who died was equal to that in the 2017-18 season, which was the worst since the Centers for Disease Control and Prevention began tracking flu-season deaths in 1976.

If you catch the flu, experts say, having had the shot makes it much less likely that you will be hospitalized or die.

Because of the fears of a “twindemic,” flu shots were made in large numbers this year and distributed to pharmacies and doctors’ offices beginning in August, which is early. As of late last month, some doctors reported difficulty ordering as many as they want, but pharmacy chains say they are getting steady supplies. To find a flu shot, try or one of the chain pharmacy websites, such as

There are at least 100 viruses that can cause the common cold, but only four that cause seasonal flu. Many people who catch colds assume they have the flu, but experts consistently say the same thing about how to tell the difference: “Flu makes you feel as if you were hit by a truck.” The fever, aches and headaches of a bad case of influenza are generally worse than a case of respiratory syncytial virus, rhinovirus or other common cold viruses.

Everyone knows the symptoms of the flu: fever, headaches, body aches, sore throat, runny nose, stuffed sinuses, coughing and sneezing — and, for infants, ear infections. Some victims, especially children, get diarrhea or vomiting too.

In severe cases, the most common complication is pneumonia. The typical signs of a flu pneumonia are shortness of breath, especially when you exert yourself, and unusually rapid breathing — doctors typically look for that in children — and sometimes pain in the chest or back.

Knowing whether you have Covid-19 is much more complicated because there are so many different — and sometimes pretty wacky — symptoms, many of which echo those of the flu.

The most common symptoms are high fever, sometimes with chills, a dry cough and fatigue.

The one sign that really distinguishes the two infections is that many Covid-19 victims suddenly lose their sense of smell — not because they have a stuffy nose, but because they don’t register even strong odors like onions or coffee. Not all virus victims get anosmia, the formal name for loss of smell, but one study found that 87 percent did.

Less common symptoms include a sore throat, congestion, runny nose, vomiting, diarrhea, stomach pain and feeling somewhat out of breath when exerting yourself. Some victims have red or itchy eyes, and some get redness or blisters on their fingers or toes — so-called Covid toes, which resemble chilblains.

More dangerous symptoms — which mean you should get immediate medical attention — include serious breathing difficulty; pain or pressure in the chest; blue lips or blue face; confusion or incoherent answers to simple questions; and collapsing or losing consciousness.

Adding to the disease’s fearsome nature is that it can cause blood clots that lead to heart damage, brain damage and lung damage. And even some cases that appear mild or asymptomatic create signs of what doctors believe may be long-lasting heart damage.

Another unusual aspect of Covid is that people sometimes develop pneumonia without realizing how sick they are. Doctors are unsure why; one theory is that the air sacs in the lungs are damaged in a way that does not cause the buildup of carbon dioxide, which creates that “desperate for air” feeling.

However, as with diseases like measles, you can start spreading the virus two days before you begin to feel sick. So if you think you might have been exposed, it is very important to warn others and isolate yourself from them as soon as you can, especially if they are older or medically fragile.

It is an axiom of general medicine that when one disease is sweeping through an area and a patient has its symptoms, it is usually safe to assume that’s what the patient has and begin treating it, rather than waiting for test results. So unless both the flu and the coronavirus begin circulating heavily at the same time in your city, do not be surprised if your doctor does not recommend a test.

And getting tested for the coronavirus can be tricky, especially with so many test delays. The PCR type is more accurate than 15-minute “rapid antigen tests,” but it can take hours or even days to return results, depending on whether it has to be sent away to a central lab.

One positive test probably means you are infected, but one negative test should not be trusted; too many things can go wrong. Two negative PCR tests taken at least 24 hours apart are a better indication of whether or not you are infection-free.

If your insurance company will pay for only one test, you might consider paying for the second one yourself for the peace of mind.

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