What do you need to do after the quarantine?
Recently, Mr. Dong told Ask Beijing that he and his wife had been infected with COVID-19 before and were treated in isolation at home. Children and old people live outside temporarily, but they are not infected. With the gradual improvement of Mr. Dong and his wife's physical condition, from positive to negative, Mr. Dong has doubts about when the isolation will officially end and when the elderly and children will be taken back.
Mr. Dong: My wife and I are in similar health now, and there is no problem. Now the next step we are worried about is whether there is this virus on these things that we have been in contact with every day during this time in the house, whether the children will be infected after coming back, and what we need to do at home before coming back. Like Xiao Sha.
How to kill low temperature environment such as refrigerator?
At the same time, Mr. Dong said, apart from the normal temperature environment such as the refrigerator at home, will the virus survive more easily, and what special disinfection do they need to do?
Director Dong: Because I looked it up on the Internet, it may look better on the surface, but things in the refrigerator or attached to protein and water may last longer, so will everything in my refrigerator be thrown away?
Expert: appropriately extend the isolation time.
In fact, apart from Mr. Dong, many citizens have reflected to "Ask Beijing" their similar confusion about how to deal with the whole isolated environment at home after changing from Yang to Yin. The reporter asked Professor zhaowei from the School of Public Health of Southern Medical University. He said:
Zhaowei: After the patient is released from isolation, the possibility of novel coronavirus does exist in the environment. However, because I think the environment in which we live is generally complicated and there are many corners, it is difficult for us to kill all the novel coronavirus in it through unprofessional disinfection. At the same time, any disinfectant we use will cause secondary pollution to the environment, so I personally do not advocate disinfection.
Professor zhaowei believes that novel coronavirus in isolated environment can disappear by prolonging the isolation time after patients recover.
Zhao Wei: Actually, novel coronavirus's resistance to the external environment is relatively weak. We often say that it can survive on a dry surface for up to three days at room temperature. I also suggest that after our symptoms completely disappear and the antigen test is negative, we can extend the time of our home isolation. If our conditions allow, say, three days, then the probability that novel coronavirus will survive in all the articles in our isolation room is very low.
The refrigerator can be wiped with alcohol.
Regarding the problem that the virus is easy to survive in a low temperature environment like a refrigerator mentioned by the public, Professor zhaowei said:
Zhao Wei: Because our virus is cold-resistant and heat-resistant, it is indeed possible for the refrigerator to survive in novel coronavirus for a long time, so we can wipe the refrigerator with alcohol after power failure. Of course, pay attention to safety work. Basically, novel coronavirus was killed without a place to live.
Adjust your mentality and don't be too nervous.
In addition, Professor zhaowei said that citizens should also adjust their mentality and not be overly nervous about the isolated environment where positive patients live.
Zhao Wei: We still have to eliminate the fear of being infected by COVID-19. Great changes have taken place in novel coronavirus now and COVID-19, and the toxicity was very strong at the initial stage of the epidemic. If we look at the infected person and his living environment with a calm mind, it may relieve us a lot of psychological pressure.
Strengthen exercise and improve physical fitness.
At the same time, Professor zhaowei suggested that patients should not only adjust their mentality after rehabilitation, but also strengthen exercise to improve their physical fitness.
Zhao Wei: Then we will recover from the infection of the new crown, and everyone will realize the importance of personal physical quality. In fact, through the observation of some clinical manifestations of people with many early infections, everyone's symptoms will be very different, which is related to their physique. Therefore, improving physical fitness is what we need to do after recovery. In terms of diet, I think we can give priority to light, nutritious and digestible food for the time being. In addition, strengthening physical exercise and improving physical fitness is a very important guarantee for our healthy life.
After "Yang" turns to "Yin", we can appropriately extend the isolation time, pay attention to the disinfection work in refrigerators, toilets and other places, adjust our mentality, strengthen exercise and enhance our physical fitness.
Extended reading:
Zhong Nanshan: It takes three days for my granddaughter to be infected with COVID-19 virus.
Academician Zhong Nanshan brings lectures on popular science to college teachers and students online. Video screenshot
"The mortality rate in COVID-19 has dropped to about 0. 1%, which is equivalent to seasonal influenza. This name is no longer COVID-19, but SARS in Chinese. Because there is no pneumonia, its state is actually an upper respiratory infection in COVID-19, or even a manifestation of' COVID-19 cold'. " 12 15, Zhong Nanshan, an academician of China Academy of Engineering, gave a lecture at the National Lecture Hall on Epidemic Prevention in Colleges and Universities. "The focus of prevention and control policies should shift from prevention and control of infection to prevention and control of severe diseases, but prevention of infection still needs to be done, and we cannot all lie flat." He also revealed at the event that the tenth edition of the COVID-19 Epidemic Prevention and Control Guide will be published soon, which is conducive to the gradual liberalization of epidemic prevention and control and smoother economic development.
The theme of this popular science lecture given by Zhong Nanshan to teachers and students in colleges and universities is "COVID-19 epidemic dynamics and countermeasures". The event was co-sponsored by Sun Yat-sen University, Peking University and Tsinghua University. Zhong Nanshan summarized the achievements made by China in fighting the epidemic in recent two years, and systematically analyzed the second wave of Omicron epidemic, including the characteristics of strong transmission and low pathogenicity. He appealed that one of the key points of prevention and control in the next step is to strengthen vaccination, and recommend booster shots for heterogeneous vaccines, so that the immune effect will be better.
Academician Zhong Nanshan gave an online lecture on popular science. Video screenshot
Is the popular COVID-19 in China "strong in the north and weak in the south"? Zhong Nanshan thinks that there is no obvious difference and essential difference between BA.5 and BF.7 popular in Guangzhou and Chongqing, and they are all symptoms of upper respiratory tract infection. He explained that BF.7 added a mutation at R346T site on the basis of BA.5.2, so BF.7 has stronger immune escape and the incubation period is further shortened. "Some people get infected the next day after contact with patients, but most people never have obvious high fever after infection. Can be said to be asymptomatic infection, some people have dry throat, sore throat, dry cough, headache, fever, as long as it does not invade the lungs and lack oxygen.
"In fact, there are also some cases of high fever and obvious pain in Guangzhou. Beijing seems to have obvious symptoms, which may be related to temperature or transmission coefficient. " Zhong Nanshan said that the statement that "the virus in Chaoyang district is more virulent than that in Haidian district" is also unfounded, and it is just a case discovery.
Zhong Nanshan introduced that the mutation of Omicron was very fast, and the total mutation rate of the site reached 96.4%, which was close to saturation. The more mutations, the stronger the resistance to vaccine. But its pathogenicity is getting weaker and weaker. Animal experiments show that Omicron infection is concentrated in the upper respiratory epithelium, and the harm to the host is obviously reduced. "Omicron infection is not terrible so far, and most of them fully recover within 7 to 10 days." He said that his granddaughter also got COVID-19 and recovered in three days. "Young people may recover faster."
But this does not mean that "yang is not important" and there is no need to prevent infection. "Some people say it's better to be sunny early than late, so there will be problems. On the one hand, it will affect our work. On the other hand, China's population base is large, and large-scale infection in a short period of time will not only affect the normal life order, but also lead to the emergence of new variants. " A similar situation happened in Brazil and India. Zhong Nanshan said that he does not advocate "sunshine for all", but hopes to have a certain time interval. "Don't.
Academician Zhong Nanshan gave an online lecture on popular science. Video screenshot
Zhong Nanshan said that from the real world data, the proportion of asymptomatic people in China has been increasing since September this year. He pointed out that asymptomatic infected people cannot be regarded as formal patients, and asymptomatic infected people have no obvious correlation with sequelae. Patients vaccinated before infection will further reduce the risk of sequelae by 30% ~ 40%. Studies have shown that the risk of COVID-19 sequelae of Omicron is lower than that of Delta.
The clinical manifestations of so-called "sequelae" include cough/dyspnea, smell and taste disorders, fever, joint/muscle pain, headache and chest pain, as well as difficulty in concentration, sleep disorder, fatigue/fatigue and mood changes. Zhong Nanshan pointed out that all these happened more than four weeks after COVID-19 recovered, but strictly speaking, they were not sequelae.
Academician Zhong Nanshan gave an online lecture on popular science. Video screenshot
Zhong Nanshan cited Qatar's national data. After Omicron infection, the protection rate of reinfection of BA.4 or BA.5 reached 78% within one year, while that of asymptomatic patients after secondary infection was 76.2%. According to Danish data, the protection rate of Omicron infection for secondary infection of BA.5 is 92.7%. "Eating Omicron once is actually like getting a shot of vaccine. Whether it is cellular immunity or humoral immunity, it has a good protective and preventive effect on secondary infection. " Zhong Nanshan said.
Academician Zhong Nanshan gave an online lecture on popular science. Video screenshot
He also cited real-world data, showing that inactivated vaccines made in China can effectively prevent serious diseases. In addition, compared with homologous inactivated vaccine immunization, heterologous immunization can induce a higher level of neutralizing antibodies and enhance the protection of various mutant strains. Domestic unpublished laboratory data show that the neutralizing antibody titer of two-needle inactivated vaccine plus 1 needle subunit protein vaccine or adenovirus vaccine is several times higher than that of three-needle inactivated vaccine, and the neutralizing antibody titer of adenovirus inhalation vaccine can reach 10 times. Randomized double-blind phase III trials in Pakistan and Malaysia also showed that the absolute protection of domestic recombinant protein vaccine was equivalent to that of mRNA vaccine based on 2-needle inactivated vaccine. Zhong Nanshan suggested speeding up the research and development of nasal spray or atomized vaccines and antibodies, and hoped that the drug regulatory authorities would speed up the examination and approval process.
Academician Zhong Nanshan gave an online lecture on popular science. Video screenshot
Zhong Nanshan finally put forward eight suggestions to strengthen personal protection: First, strengthen protection, wear masks, keep a distance and reduce public gathering; Second, don't be afraid of infection. At present, there are few serious deaths in COVID-19; Third, most infected people can be isolated at home without going to the hospital; Fourth, pay attention to the antigen detection at home, which is highly specific; Fifth, if you have a fever for more than three days, you must go to the hospital to check for complications or other conditions; Sixth, the elderly with general chronic diseases should also be vaccinated, especially encouraged as long as the disease is in a stable period; Seventh, there is no need to hoard medicine; Eighth, "new use of old drugs" must be strictly demonstrated. He specifically mentioned that if family members are infected, N95 masks can be used to strengthen protection.