Post by account_disabled on Mar 2, 2024 5:19:41 GMT
After experts pointed out that the B.1.1.7 variant of SARS-CoV-2, first discovered in Southeast England, was more contagious but not deadlier than the original virus, British Prime Minister Boris Johnson said on January 22 that this variant appeared that it was associated with higher mortality. Yesterday this is something unusual. Usually viruses tend to become less deadly over time. Why is this virus not following this rule? For organisms to reproduce, genetic material must be copied over time. Sometimes, errors occur during this process, which turn into mutations. Such mutations occur in animals, plants, fungi, bacteria and viruses. They are almost always fatal, so the offspring die with them before they can reproduce.
Very rarely, the error Cambodia WhatsApp Number Data that has occurred confers such an advantage that it helps the offspring to reproduce more successfully than their unaltered "relative". Viruses depend on the people who spread them, and many, such as HIV, Ebola and the original SARS, usually make a person particularly infectious only after they have spread throughout the body. Read also: Actor Muharrem Hoxha tearfully confesses that he lost his wife after being infected with Covid Flu or COVID in Albania? Virologist: It could be the JN1 variant At that point, the human cells carrying the virus are under full-scale attack, the immune system is overworked, and the sufferer feels physically exhausted and in a terrible state.
From an evolutionary perspective, the virus benefits if this period of extreme infectivity continues as long as possible in order to give its progeny more time to spread. But killing the host suddenly limits the chances of a virus infecting others, even if the virus can spread from a corpse. This is why mutations that make a virus less lethal are often favored by natural selection. However, in the case of SARS-CoV-2 this is not a factor, as the virus makes people most infectious by the time they first show symptoms, and several weeks before they die from health complications. If a person dies a few weeks after being highly infectious, this has almost no effect on the evolutionary trajectory of the virus. It is therefore just as likely that random mutations will appear in the viral genetic code, making it more lethal, as there are other equally random mutations that make it less lethal.
Very rarely, the error Cambodia WhatsApp Number Data that has occurred confers such an advantage that it helps the offspring to reproduce more successfully than their unaltered "relative". Viruses depend on the people who spread them, and many, such as HIV, Ebola and the original SARS, usually make a person particularly infectious only after they have spread throughout the body. Read also: Actor Muharrem Hoxha tearfully confesses that he lost his wife after being infected with Covid Flu or COVID in Albania? Virologist: It could be the JN1 variant At that point, the human cells carrying the virus are under full-scale attack, the immune system is overworked, and the sufferer feels physically exhausted and in a terrible state.
From an evolutionary perspective, the virus benefits if this period of extreme infectivity continues as long as possible in order to give its progeny more time to spread. But killing the host suddenly limits the chances of a virus infecting others, even if the virus can spread from a corpse. This is why mutations that make a virus less lethal are often favored by natural selection. However, in the case of SARS-CoV-2 this is not a factor, as the virus makes people most infectious by the time they first show symptoms, and several weeks before they die from health complications. If a person dies a few weeks after being highly infectious, this has almost no effect on the evolutionary trajectory of the virus. It is therefore just as likely that random mutations will appear in the viral genetic code, making it more lethal, as there are other equally random mutations that make it less lethal.