Why were there no asymptomatic infections during the SARS period?

Because the virus during the SARS period basically showed symptoms, and the virus now spreads relatively quickly, it is very likely that it will mutate.

Because the characteristics of the SARS virus are like this, the SARS virus is very virulent, but its contagiousness is not strong at all, so there are no asymptomatic patients.

Because the symptoms of SARS are not as serious as the current new crown pneumonia, and the transmission speed is not as fast as the new crown pneumonia, it can be said that the "virulence" of the SARS virus is more controllable than that of the new coronavirus. It's just that it's still difficult to develop drugs.

The reason why there were no asymptomatic infections during the SARS period is because SARS and the current new crown pneumonia are different pathologies, and this time it is new.

The disappearance of SARS is due to China's strong fight against the epidemic, and second, because of the rising temperature in summer.

The epidemic prevention of this new pneumonia has been quite long, and many people will think of the SARS incident in 2003, which was also the joint fight against SARS across the country, and the fight against SARS lasted for half a year.

SARS occurred in the winter of November 2002, and the SARS pneumonia virus should be suitable for cold air transmission, which is similar to the climate in which the new pneumonia occurred, and in March 2003, as the temperature rose, the SARS virus disappeared naturally.

The decisive measures of the state**, SARS mainly occurred in Hong Kong and Guangdong that year, and then began to spread to the whole country, among which there were more cases in Xiaotangshan in Beijing. In order to stop the spread of the epidemic, the same measures as in Wuhan are implemented now, that is, the lockdown.

Fighting with the sky and the earth, man will win the sky? Sometimes the will of heaven cannot be violated, violating the laws of nature, it is always human beings who pay the bill, the more prosperous the more destructive, and no one can say whether SARS will die out naturally!

In recent years, erythromycin-resistant Mycoplasma pneumoniae has emerged worldwide, which has brought difficulties to clinical practice. X0D X0a needs to be provided with energy and nutrients by the host cell, which is obligate intracellular parasitism and can be fatal in severe cases.

The reasons why the epidemic is not over are as follows: the new crown is more contagious, the new crown is not afraid of the weather, the lower fatality rate, and the current stage of the vaccine is not so good.

First, the new crown is more contagious.

The symptoms of SARS and COVID are relatively similar, both have fever, high fever, and cough. However, SARS is less contagious during the incubation period, and the new crown is also highly contagious during the incubation period. And as the virus continues to mutate, by the time we found a COVID patient, the virus had been circulating in the community for a long time.

And the traffic now is not the same as it was in 03, and the movement of people between provinces and regions has become more and more frequent, which also makes the spread of the virus faster.

Second, the new crown is not afraid of the climate.

Why SARS suddenly disappeared is still inconclusive. However, it is generally believed that the disappearance of SARS is related to the climate, SARS is not resistant to high temperatures, and when the climate warms, the spread of SARS is greatly limited. It was not even possible to conquer the tropical countries as a result.

But the new crown is different, maybe the new crown virus was a little afraid of high temperatures at the beginning. But now the origin of Omicron is in hot South Africa, whether the weather warms up or not, it really has no impact on the current new crown, and the current new crown has long been fearless.

Third, the lower lethality.

Although the new crown is stronger than SARS in terms of adaptability and transmissibility, in terms of fatality rate, the new crown is not as good as SARS. But that's not a good thing. It is precisely because of the high fatality rate of SARS that when SARS broke out, everyone was on guard and took more precautions against it, resulting in SARS being strangled in the cradle without large-scale spread.

The fatality rate of the new crown is not as good as SARS, although my country is strictly guarding against SARS, and reminding countries around the world early that they must be careful about this. But they don't take this seriously at all because of the fatality rate, and even now in 2022, they are still making a fuss about the fatality rate, and they are lying flat and laissez-faire about the new crown. As a result, the coronavirus has intensified.

Fourth, the vaccines at this stage are not so easy to use.

The best way to deal with the virus is to get vaccinated, but the frustrating thing is that the new crown is so widespread that it mutates so frequently that it can be said that a new wave will come every few months. And the current vaccine, first of all, after vaccination, cannot prevent 100% non-infection.

Secondly, the current vaccines are lagging behind, Delta is infected, and the vaccine to prevent Delta began to be developed, but when the vaccine was successfully developed, the virus had mutated and became Omicron.

About the beginning of SARS in 2002, about the end of July 2003, the said SARS is a respiratory infectious disease caused by SARS coronavirus infection, the spread rate is fast, hospital or family clusters, will spread through the respiratory tract, acute onset will have high fever cough, accompanied by systemic and respiratory symptoms, for SARS ** is mainly symptomatic ** and support**.

Acute onset, the disease can be in a progressive state for 2 to 3 weeks from the date of onset. There are three main types of symptoms.

1) Fever and related symptoms.

Fever is often the first and main symptom, the body temperature is generally higher than 38, often persistent high fever, can be accompanied by chills, muscle aches, joint pain, headache, fatigue. In the early stages, antipyretics may be effective; In the advanced phase, it is often difficult to control hyperthermia with antipyretics. The use of corticosteroids can interfere with the thermotype.

2) Respiratory symptoms.

There may be a cough, mostly dry cough with little phlegm, and a small number of patients have a sore throat. Upper respiratory catarrhal symptoms are often absent. There may be chest tightness, and in severe cases, rapid breathing, shortness of breath, and even respiratory distress may gradually appear. Dyspnea and hypoxemia are more common after 6 to 12 days of onset.

3) Other symptoms.

Some patients have gastrointestinal symptoms such as diarrhea, nausea, and vomiting.

Cold, fever, cough, low-grade fever that does not go away, or recurrent low-grade fever.

Initially with fever as the first symptom, there may be chills, body temperature often exceeds 38, irregular fever or relaxation fever, residual fever, etc., the fever duration is mostly 1 2 weeks; Accompanied by headache, muscle aches, malaise, and diarrhea. 3 7 days after the onset of symptoms, dry cough, little sputum, occasional bloody sputum, pulmonary signs are not obvious. The condition peaked in 10 to 14 days, fever, fatigue and other symptoms of infection and poisoning aggravated, and frequent cough, shortness of breath and dyspnea, shortness of breath and palpitations with slight activity, forced bed rest.

Secondary infections of the respiratory tract are prevalent during this period.

SARS generally refers to severe acute respiratory syndrome, which is an acute respiratory infectious disease caused by SARS coronavirus (SARS-CoV), which is named severe acute respiratory syndrome by the World Health Organization (WHO). The disease is a respiratory infectious disease, and the main mode of transmission is close droplet transmission or contact with respiratory secretions of patients.

SARS virus is a variant of the coronavirus, the causative agent that causes atypical pneumonia. The variant coronavirus is related to the influenza virus, but it is a very unique type of coronavirus.

For epidemics caused by viruses, vaccination** is often used to eliminate them.

1. Mode of transmission.

The SARS virus is excreted from the body through respiratory secretions, transmitted through oral fluids, sneezing, contact, and transmitted through airborne droplets, with the peak of infection in autumn, winter and early spring. The virus is sensitive to heat, and ultraviolet light, lyssoic water, peracetic acid and 1% creelin can kill the virus in a short time.

2. Disease prevention.

There are specific precautions for SARS virus prevention, that is, targeted preventive measures (vaccines, vaccine development is possible, but it takes a long time, and solving the problem of virus reproduction is a problem) and non-specific preventive measures (that is, measures to prevent respiratory infectious diseases in spring, such as keeping warm, washing hands, ventilating, not being overly tired and not touching sick people, and avoiding crowded public places, etc.).

3. Clinical vaccines.

1.Immunoprophylaxis with mucosal vaccines and inhibitory antibodies (based on animal models done in monkeys).

2.Immunity to SARS vaccine induces the production of suppressive antibodies against coronaviruses, suggesting that mucosal immunity can elicit a systemic immune response. In animal experiments, after the coronavirus was administered, the control group of animals all had virus transmission, and none of the monkeys vaccinated against SARS became ill.

3.The researchers used inhibitory human monoclonal antibodies** to ferrets infected with SARS virus, which significantly reduced the replication of the virus in the lungs, prevented the lungs from progressing to the typical pathological stage, and did not see the virus secreted and transmitted in the pharynx.

4.Studies have shown that respiratory mucosal immunization and immunization in animal models can effectively prevent SARS.

Eliminate the infected people, it's okay, stop the spread, but now that the Chongqing pneumonia has been breaking out for several months, I don't know if it's a SARS mutation.

SARS is isolated, there is no virus, all the sick people are killed, and they will all die later, or there is a person who has researched the research on the virus and researched the vaccine and researched the medicine.

And they disappear on their own, and a lot of viruses are limited by the environment, and after that period of time, they die out naturally.

It's been a long time, and it's definitely gone, otherwise you wouldn't have had a chance to ask questions here.

Summary. Dear, hello is a pleasure to serve you, SARS may have disappeared due to the following reasons: 1. Weather reasons.

When SARS occurred, the global temperature began to warm, and the mortality rate of SARS virus increased in the high temperature and high humidity environment, which is the reason why SARS can be eliminated quickly. 2. Strong control measures. After the high contagiousness and severity of SARS were discovered, mandatory isolation measures were carried out to effectively control the transmission route of SARS.

3. The efforts of all medical staff. After the outbreak of SARS, many medical staff rushed to the front line, racing against time to rescue patients, and the most effective methods can completely eliminate SARS. SARS usually refers to infectious atypical pneumonia, also known as severe acute respiratory syndrome, which is an acute respiratory infection caused by the SARS coronavirus.

SARS is mainly transmitted through short-distance droplets, contact with respiratory secretions of patients and close contact, with fever, headache, muscle aches, fatigue, dry cough with little phlegm, diarrhea and other major clinical manifestations, and severe patients can experience shortness of breath and respiratory distress.

Dear, hello is a pleasure to serve you, SARS may have disappeared due to the following reasons: 1. Weather reasons. When SARS occurred, the global temperature began to warm, and the mortality rate of SARS virus increased in the high temperature and high humidity environment, which is the reason why SARS can be eliminated quickly.

2. Strong control measures. After discovering the high contagiousness and severity of SARS, we carried out mandatory isolation measures to effectively control the transmission route of SARS. 3. The efforts of all medical staff.

After the outbreak of SARS, many medical staff rushed to the front line, racing against time to rescue patients, and the most effective methods can completely eliminate SARS. SARS usually refers to infectious atypical pneumonia, also known as severe acute respiratory syndrome, which is an acute respiratory infectious disease caused by the SARS coronavirus. SARS is mainly transmitted through short-distance droplets, contact with respiratory secretions of patients and close contact, with fever, headache, muscle aches, fatigue, dry cough with little phlegm, diarrhea and other major clinical manifestations, and severe patients can experience shortness of breath and respiratory distress.

And the main thing is 1The route of transmission is strictly controlled. SARS, like today's coronavirus, was a disease caused by coronavirus.

Moreover, SARS, like the new crown, can also cause patients to develop respiratory symptoms, which in turn causes the spread of the virus copper drum droplets. 2.Effective medical measures have carried out effective medical measures for patients, which is also one of the important reasons for the end of the SARS epidemic.

Although the medical conditions of the Yehao faction at that time were not as good as they are now, our country has also done everything it deserves and respected every life3The characteristics of the virus are also one of the important reasons for the rapid end of the SARS epidemic. The causative agent of SARS is also a coronavirus, but the virus is very heat-tolerant.

As soon as the temperature rises slightly, the virus loses its ability to spread. As the weather gets hotter, the SARS virus has fewer and fewer shelters, and it is difficult to spread to people through the environment, which makes the SARS virus lose an important way of transmission.