It takes several years, or even as long as 10 years or more, for HIV infected people to develop into AIDS patients. Because of the extreme decline in resistance, there will be a variety of infections, such as herpes zoster, oral mold infection, pulmonary tuberculosis, enteritis caused by special pathogenic microorganisms, pneumonia, meningitis, candida, pneumocystis and other pathogens. Malignant tumors often occur in the later stage, and long-term consumption occurs. And died of failure all over the body.
AIDS is a very harmful infectious disease caused by HIV. HIV is a kind of virus that can attack the immune system of human body. It takes the most important CD4T lymphocytes in the human immune system as the main target, destroys the cells and makes the human body lose its immune function. Therefore, the human body is prone to various diseases, and can have malignant tumors, the fatality rate is high. The average incubation period of HIV in the human body is 8-9 years. Before suffering from AIDS, you can live and work without any symptoms for many years.
Carol MacArthur, a professor of stomatology and cranes at the University of Missouri in Kansas City and co-author of the study, said in a statement: "this finding reminds us that to end the HIV epidemic, we must continue to think ahead of the changing virus and use the latest advances in technology and resources to monitor its evolution."
Although many medical researchers around the world have made great efforts, they have not yet developed special drugs to cure AIDS, and there is no effective vaccine that can be used to prevent AIDS. In an interview with American media USA TODAY, Manish Sagar, an associate professor at Boston University, said the existing HIV treatments were effective for the new strain, but due to the lack of various data, the effectiveness of the treatments still needs to be verified. WHO estimates that 75 million people worldwide are infected with HIV and about 32 million die of HIV. By the end of 2018, there were 37.9 million people around the world Surviving people infected with HIV.
In order for scientists to be able to declare this to be a new viral subgroup, three related cases must be detected independently. The first two cases were found in the Democratic Republic of the Congo in 1983 and 1990. Rogers said the two strains were "extremely rare and did not match other strains." The third sample found in the country was taken in 2001 as part of a study aimed at preventing mother-to-child transmission of AIDS. The size of the sample is small, and although it looks similar to the previous two samples, scientists want to test the entire genome to make sure it is foolproof. At the time, it was not possible to determine whether it belonged to The technique of new subtypes. As a result, scientists at Abbott and the University of Missouri developed new techniques to study 2001 samples and map their genes. They were able to fully sequence the genes of the sample, which meant that they could map its complete gene and determine that the sample was actually an L subgroup in group M.
There are two types of HIV virus, HIV-1 and HIV-2, and these two types have various groups and subtypes, among which HIV-1M group is the strain group with the largest number of infections at present. Two samples of type L virus were discovered as early as 1983 and 1990, respectively. The third sample was discovered in 2001, but it was not until this year that researchers used second-generation sequencing technology to "catch" the subgroup because scientists did not have the technical means to sequence it.
There are many different subtypes of HIV, that is, strains, and they, like other viruses, can change and mutate over time, the report said. This is the first new strain discovered since the classification guide of HIV virus subtypes was developed in 2000. It is important to know which strains are epidemic to ensure the effectiveness of AIDS testing. Mary Rogers, one of the authors of the study and chief scientist at Abbott, said: "this can be a real challenge for diagnostic testing." Anthony Fossi, director of the National Institute of allergies and Infectious Diseases, said the current HIV treatment for the strain and Other strains are effective. However, the discovery of new strains will provide a more complete map of the evolution of HIV. "there is no reason to panic, or even to be a little worried," Fossi said. Not many people will be infected with the virus. This is a cold strain. "
For the first time in 19 years, a team of scientists has discovered a new strain of HIV, American media said. On Nov. 6, Abbott's official website said its team had discovered a new subgroup of HIV, named HIV-1 M, the family of viral subtypes believed to have caused a global AIDS epidemic, meaning that scientists had discovered new subtypes for the first time since the guidelines for the classification of HIV strains were established in 2000, a study also published in the medical journal Journal of Acquired Immune Deficiency Syndrome.
It is not clear how the subgroup may have a different effect on the human body, if it does, the report said. Existing HIV treatments can resist a wide range of strains, and are believed to be resistant to the newly discovered strain.
（Picture Source:Sogou）
According to the study, AIDS originated in Africa and was later brought into the United States by immigrants. On June 5, 1981, the Centers for Disease Control and Prevention published the case reports of five AIDS patients in the Journal of Mortality and Mortality, the first official record of AIDS in the world. In 1982, the disease was named "AIDS." Before long, AIDS spread rapidly to all continents.
