Coronavirus All you need to know about symptoms and risks - Hut Mobile

Coronavirus All you need to know about symptoms and risks

Coronavirus All you need to know about symptoms and risks

After the city was closed in Wuhan and other places, the new coronavirus is still spreading, and the number of infected people has exceeded SARS that year, but the mortality rate is lower than SARS. What information do people have about this disaster?

Who is the pathogen?

What can be confirmed now is that the real culprit of Wuhan pneumonia was the new coronavirus 2019-nCoV discovered not long ago? Chinese scientists have proved that this virus is the pathogen of this infectious disease.

Where does this pathogen come from?

Virologists clearly point out that the new crown virus is not SARS or its variants. The genetic sequence similarity between the two is only 80%, which is a fairly distant relative (the genome similarity between humans and orangutans is as high as 98%). It has been known that the natural hosts of SARS and MERS, which belong to the coronavirus family, are likely to be bats. Mammals such as bats have higher body temperatures and special immune systems and are also natural hosts for many dangerous viruses. From this perspective, the natural host of the new crown virus is likely to be a bat.

How does the new coronavirus reach the human body?

This requires confirmation of the intermediate host, which is to find the intermediate chain of the new coronavirus from bat to human. The new coronavirus is highly similar to the virus in bats, but a 4% difference also means that the virus in bats is unlikely to infect humans directly. On the other hand, the virus samples in patients with neo coronavirus pneumonia are highly consistent with each other in gene sequences, which suggests that the virus should start to erupt after completing evolution in some intermediate host.

 

In the cases of SARS and MERS, scientists confirmed that civet and camel are the most important intermediate hosts of the two viruses. The virus spread and mutated widely in their populations, and eventually became a virus that could directly invade the human body and cause disease.

During the transmission of this new type of coronavirus, most of the early cases were related to the South China Seafood Market in Wuhan. Mainstream speculation is that certain wild animals sold there are intermediate hosts of the virus. Professor Wang Liming of Zhejiang University’s Institute of Life further speculates that this intermediate host should be some kind of semi-wild mammal that can be raised on a larger scale because it can provide time for the mutation of the virus.

Virulence of new coronavirus?

The overall mortality rate caused by the new coronavirus is currently around 3%, lower than SARS 10%, and much lower than MERS 35%. Professor Wang Liming of Zhejiang University’s Institute of Life Sciences believes that if you consider that most patients have mild symptoms and never even go to the doctor, the 3% mortality rate is greatly overestimated. But its virulence is stronger than the flu, and there is a tendency to become stronger. Li Taisheng, director of the Department of Infectious Diseases at Peking Union Medical College Hospital, believes that from the data released now, the severity of pneumonia caused by new coronavirus is not lower than SARS.

China Coronavirus Offizier Atemmaske in Beijing (Reuters / CG Rawlins)
Beijing Armed Police

Coronavirus All you need to know about symptoms and risks

What is the spread of the new coronavirus?

For the spread of the virus, there is a quantitative indicator and the basic number of infections RO, which means that, without external intervention, an infected person can be transmitted to several people on average. The larger the RO, the stronger the transmission. If RO is less than 1, it means that the disease will slowly die out.

Regarding new coronaviruses, reliable estimates are currently lacking. The World Health Organization on January 23 gave a rough estimate of the country between 1.4-2.5. For comparison, measles (12-18), smallpox (3.5-7), influenza (2-4), SARS (2-5). But at the same time, there are also some studies that believe that the transmission of the new crown virus is stronger than this, and even model calculations suggest that R0 will be around 4 or even about 5.

What is the incubation period of the new coronavirus?

Li Taisheng, director of the Department of Infectious Diseases, Peking Union Medical College Hospital, said that the incubation period is about 10 days, the shortest is 1 day, and the longest is about 14 days, while the SARS virus incubation period is 6 days on average.

Is the incubation period of the new coronavirus infectious?

Have. The latency of new coronaviruses is infectious, which is different from SARS. Therefore, experts suggest that medical observation and relative isolation should be carried out within 14 days after exposure to the disease source.

BG Alltag in der Stadt Wuhan (Getty Images / AFP / H. Retamal)
Wuhan police measure body temperature

What are the characteristics of a new coronavirus infection?

The main clinical manifestations of new coronavirus pneumonia are fever, fatigue, and dry cough. However, experts also found clinically, there were also confirmed cases without fever and cough, but lack of appetite, fatigue, muscle aches, or poor spirit.

Coronavirus All you need to know about symptoms and risks

Is there a cure or a vaccine?

No. In response to a brand new virus and an outbreak of infectious diseases, people are particularly looking forward to the emergence of specific drugs and vaccines. But the fact is that the development of drugs and vaccines, human clinical validation, mass production, distribution and use, even if all goes well, will still take a long time. The time window for preventing and controlling infectious disease outbreaks is far from that. Li Lanjuan, a member of the Chinese Academy of Intermediate Affairs, told CCTV News 1 + 1 that it will take another three months before the vaccine is born.

The best way to prevent and control new pneumonia?

That is isolation. As long as it can be done so that people who are already sick cannot continue to spread and people who are not yet infected will not be infected, then we can effectively prevent and control this disease. As individuals, experts recommend washing hands frequently and wearing masks to avoid crowds.

When will quarantine measures take effect?

Wen Yumei, a professor of medical molecular virology at Fudan University, believes that the number of confirmed cases is now because some people have been infected more than 20 days ago. The measures now taken are to prevent possible secondary or tertiary infections in the future. Therefore, in general, the spread of the epidemic will decrease after about 20 days. She said that the current measures will see results in more than 20 days.

After being suspected of infection, go to the hospital or quarantine at home?

Cao Wei, deputy director of the Department of Infectious Diseases of Peking Union Medical College Hospital, said, “At present in Wuhan if it is mild, it is recommended not to crowd into the hospital. If it cannot be ruled out, you can first isolate yourself. But if the symptoms are significant, you should seek medical treatment in time.

How can a suspected case be diagnosed?

Li Taisheng, director of the Department of Infectious Diseases, Peking Union Medical College Hospital, believes that if the body is not good and infection symptoms occur, you can wear a mask to the hospital to check the blood routine to see if the white blood cell index is low, and then perform a chest CT. If the chest CT shows viral pneumonia, use this as evidence to ask the doctor for a diagnosis.

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Coronavirus All you need to know about symptoms and risks
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