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Scientists have recently confirmed the first case of Covid-19 reinfection in the United States. When a Nevada man has been tested positive for coronavirus twice over three months, the tests have shown that he had been infected with two different strains of the virus. So how long is the phenomenon and how worried you are? Read on and ensure your health and health of others, do not miss theseWithout signs that you have already had coronavirus.

What is the probability that you are reinfected with coronavirus? It's extremely rare

At present, it seems that the reinfection of coronavirus is extremely rare. 38 million cases reported worldwide since the end of the pandemic started at the end of 2019, only five reinfections have been confirmed,The New York Times reported on October 13th.

Described in the newspaperThe lancet, that the first American case involved a 25-year-old man in Reno, Nevada, whoPositive Tested for Covid-19 in April and recovered from light coronavirus symptoms - including headaches, cough, sore throat, nausea and diarrhea - about 10 days. At the end of May, he became ill. This time, his illness was more severe, requiring additional hospitalization and oxygen, even though he had developed coronavirus antibodies after his first combat. He has since retrieved.

"That's all about" Dr. William Schaffner, an infectious expert on the medical center of the University of Vanderbilt, "said NBC News. "If this type of reinfection is common, we must then worry about the strength of protection we will receive vaccines."

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Seconds infections can be more serious. Why?

This week, the newspaperClinical Infectious DiseasesreportedOn the first known death of coronavirus reinfection: a 89-year-old woman in the Netherlands who was undergoing chemotherapy for cancer. The woman became sick earlier this year, found, then positive tested for coronavirus again about two months later. She died of this disease after two weeks.

Scientists do not know why reinfection occurs and why second infections could be more serious. Could it have something to do with viral force, viral load, the overall health of the patient, or a mixture? At the same time, it is difficult to know how long the body produces antibodies against the disease after the average person is infected; The last estimate isabout three monthsAlthough it is far from definitive.

So far, the data show that Covid-19 reinfections are not frequent. "If it was a very common event, we would have seen thousands of cases," said Dr. Akiko Iwasaki, immunologist at the University of Yale, "said at the time.

But the actual number of reinfections of COVID can be difficult to determine because second infections, such as the first, can not produce any symptoms.

No immunity from protective measures

Experts say that cases, isolated, if they may be, remember that best practices against the fight against the fight against the fight against the fight against the fight against the anticipated control, even after having contracted the virus. "It's important to note that there are people who are reinfected, and in some of these cases you go wrong with the disease," Iwasaki said. "You must always continue to wear masks and practice social distance even if you have recovered once from this infection."

As for yourself, do everything you can to prevent you from installing - COVID-19 in the first place: Wear yourfacial maskBe tested if you think you have coronavirus, avoid crowds (and bars and evenings of the house), practice social distance, do only run essential races, wash your hands regularly, disinfect frequently affected areas and to cross this healthiest pandemic, do not miss these35 places you are most likely to catch Covid.