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Coronavirus can appear in different ways, through a wide variety of symptoms or evenNo symptoms at all. This can make it difficult to know if you have already had Covid without knowing it. Many hope they had an asymptomatic case, leaving them with antibodies that couldprotect them from future infection. Unfortunately, this hope can be wacky. In fact, a new study revealed that it is in fact unlikely that you have already had Covid. Continue reading to find out what percentage of people have really contracted the virus, and for some of the signs of a past coronavirus infection, discoverThe most durable symptoms of COVID you must know about.

The new study, published inThe lancet Journal on September 25, found that less than 1 out of 10 Americansshowed signs of coronavirus infection before From the end of July, indicating that the "vast majority" are still vulnerable to coronavirus infection.

Observing around 28,500 patients treated for dialysis across the country, researchers consultedThe prevalence of coronavirus antibodies To indicate how many people had signs before the virus. Antibodies are generally generated in the bodies of people infected in response to an infection, including coronavirus.

And the results of the researchers comply with a study that has not yet been published the Centers for Disease Control and Prevention (CDC) is currently working, according to the director of the CDCRobert Redfield.

"The preliminary results of the first round [of the study] UNRELEASEDshow that the majority of our nation, More than 90 percent of the population, remains sensitive, "Redfield said at a Senate hearing organized by the Committee on Health, Education, Labor and Pensions on 23 September" The majority of Americans are still sensitive ".

It means that even if more than seven million caseshave already been reported in the countryMost Americans are not yet having the virus despite the fact that it has been made many cases not reported due to the high level of propagation of the virus in the summer.

This finding is not only disturbing because it means that most Americans can still be infected with the virus. It also reflects thatimmunity flock as a means of stopping coronavirus can be unlikely soon. After all, collective immunity can not be achieved when sufficient population has developed a kind of virus protection to prevent it from spreading as easily.

"If we measure the immunity of herds with antibodies, this studydoes not support that there is the immunity of herds, "Shuchi AnandCo-author of the study and a nephrologist at Stanford University told CNBC.

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The study revealed that only 8 percent of dialysis patients had coronavirus antibodies. When setting the general population, Anand said he would rise to about 9 percent. To be fair, some scientists have called into question the generalization of the prevalence of infection by researchers in the general population by the study of dialysis patients.

"It's a huge dialysis jump to general adults,"Eli Rosenberg, Epidemiologist at the New York State University in Albany, which was not part of the study, told CNBC. He also explained that dialysis patients have aunderlying condition that can make them more sensitive to the infection. And for more research on prior infection,You could have HAD You Had Covid if this symptom in December reveals a study.