The number of new coronavirus re-infections is on the rise, and doctors can’t explain why.

A few weeks ago, the world’s first reported case of COVID-19 re-infection was confirmed with the help of genetics,media reported. The only way to prove that a person has been infected twice is to sequence the genome of the virus, a procedure that may not be common. A Hong Kong, China, man who returned from Europe with a new coronavirus has had milder symptoms of his second infection than the first, giving the world hope that the immune system may be better able to respond to the virus.

不久之后,美国的一份报告详细介绍了美国首例COVID-19再感染病例。这一次,二度感染COVID-19的年轻男子经历了一场要严重得多的疾病。另外,来自欧洲的报告表明,该区域也发生了再感染事件。

This is undoubtedly worrying. A few weeks later, doctors from around the world began dealing with the re-infection of the new coronavirus, but they could not explain why.

According to the Guardian, there have been more cases of re-infection recently, many of which are more serious than the first.

While the total number of re-infections worldwide remains low, at 24, and re-infections seem uncommon, scientists warn that there is no pattern of re-infection and that it is difficult to identify the real cause of re-infection. As large-scale COVID-19 cases are still being treated in many countries, patients with reintassal may go unnoticed and unresponsible. The second wave is hitting Europe, and the United States is facing a third wave.

Asymptomatic patients with re-infection may not be diagnosed again. In addition, genetic testing is required to prove whether a patient with severe symptoms is a re-infected patient.

Scientists are still trying to figure out how the immune system responds to pathogens and why some people may be susceptible to re-infection. The Guardian details a case from India in which a 25-year-old nurse was found to be infected again two months after first contracting the COVID-19 virus, and her symptoms worsened in the second round. “Her immunity is not strong enough to protect her from a second, more serious infection, despite the presence of a mediated antibody, ” Professor Jayanthi Shastri told the family.

CoVID-19’s immunity can last up to one year. Danny Altmann, professor of immunology at Imperial College London, said: “I can bet on my house that you may be safe all year but not too long. The problem is, when an immunologist tells a reporter anything about COVID immunity, it’s right within two weeks and then it’s totally wrong. “

The number of new coronavirus re-infections is on the rise, and doctors can't explain why.

In a video recorded after his return to the White House, President Trump said he was feeling much better and might be immune to COVID-19. After a number of complications, Trump spent several days in the hospital and received a compound drug treatment, including Redsyvir, Deseramisson and an experimental monoclonal drug that could not be used as a standard treatment for COVID-19. The president has not cleared the virus, and any talk of immunization is unfounded and potentially misleading.

Scientists have some theories that may explain why the virus can infect some people again. One view is that a person may have been exposed to more viruses for a second time or may have felt unwell for other reasons. Some people believe that antibodies may also harm the immune system and help the virus re-infect cells. Even more frightening is the idea that the virus could harm T cells in some patients, immune cells, which can remember and kill pathogens and promote the production of antibodies.

Experts expect more cases of re-infection in the fall and winter. The virus has spread rapidly not only in various countries but also for some patients, long enough from the first infection to now. Stephen Reicher, a professor of social psychology at the University of St Andrews, told the Guardian: “I think it’s important in every way to dispel the myth that viruses are indestructible. He warned people infected with the new coronavirus not to think they would be protected in the second wave of outbreaks.