Q: There are various theories about the origin of the new coronavirus, from deliberate planning by the US military to accidental leaks in Chinese laboratories. However, historical research on the evolution of the new crown confirms that these claims are untenable. Where did the virus come from? Is it possible that it has already spread among humans?

Dr Norman Swan: Professor Robert from Tulane University clearly described the evolution of the new coronavirus in an interview. It is not established that the virus comes from the laboratory to a large extent. Because it has evolved from bats 50 years ago to the present, and we can see the path of evolution. There is also a view that no virologist can design a virus that spreads and causes disease like COVID-19, it is natural evolution. The question is, when did the virus pass to humans? One possibility is that the virus or an earlier version of the virus was introduced to humans a few years ago, when it did not cause disease, and then the virus mutated significantly in these people, and it was only seen around October or November 2019. Kind of disease. Another more likely theory is that people from somewhere in China contracted the virus directly from bats or intermediate host pangolins, and the virus spread.

Many people now think that the Wuhan seafood market next to the laboratory is the origin of the virus, but it is unlikely. Because there is evidence that it had spread before that. The Wuhan seafood market is likely to be the first place to gather infections, where the virus spread, but not the origin. In short, the virus is not artificial.

The virus is also unlikely to have accidentally leaked from the laboratory. First of all, viruses are not the type they observe in the laboratory. In fact, according to the simple and effective principle, when things can be simply explained, why create a complicated theory? Humans are always in contact with bats. This is a simple story that can be spread from animals to humans. Hendra virus has occurred in Queensland, Australia, from bats to horses to horse trainers, it has occurred all over the world, not just in China.

Q: For an asymptomatic infected person with COVID-19, how long does it take to start the infection at most? Is there any data or research on this scenario?

Dr Norman Swan: There is some research, but not much. It seems that patients who remain asymptomatic have the same infection pattern as those who become asymptomatic. There is an incubation period here. The term for asymptomatic infected persons may be inappropriate, because the incubation period refers to the time before symptoms. Average 4 to 5 days. You may start a severe infection after 4-5 days and then reach a peak. After 5-10 days, the amount of virus in your body will decrease. Asymptomatic patients release the same amount of virus as symptomatic patients.

Q: People who have recovered from the new coronavirus have severe holes in their lungs. Is this true?

Dr Norman Swan: The long-term sequelae of the new coronavirus is still inconclusive. If you have a moderate illness, it is likely to be cured. If it is a serious illness that is still in intensive care, then you may encounter more problems than SARS-1. No relevant research has been released in this area. The symptoms shown in clinical cases include strokes caused by blood clots, damage to the heart caused by arterial inflammation, heart attacks, kidney failure and other organ damages. There are also reports mentioning thinking and memory problems. I don't think that every COVID-XNUMX patient will cause lung sequelae even if they have severe breathing problems, but this is a possibility. As the epidemic develops, these are important issues we face.

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Source: https://www.abc.net.au/radio/programs/coronacast/was-coronavirus-50-years-in-the-making/12239258

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