Many people are worried that if the strain of the new coronavirus is different, will they be infected by the new coronavirus again?
According to Science and Technology Daily, recently, Zhang Boli, an academician of the Chinese Academy of Engineering, answered questions related to 's secondary infection with -
"The probability of re-infection with the new coronavirus is mainly related to the level of human immunity, virus strain mutation and later personal protection." Zhang Boli said that compared with early mutant strains, the strains of the Omicron family can cause more breakthrough infections and repeated infections, and can escape the antibodies in people who have recovered from the new coronavirus infection.
However, Zhang Boli said that everyone should not worry too much. Although there is no evidence from a large sample of people to show the specific time for sustained immunity after infection with the Omicron variant, the human immune system is already functioning after infection with the new coronavirus. Current clinical observations show that the probability of secondary infection with COVID-19 within 3 to 6 months after infection is still relatively low.
If reinfection occurs, we must first distinguish between "re-positive" and secondary infection. "Re-positive" occurs within 2-3 weeks after turning negative. The patient generally has no obvious clinical symptoms. It is mainly -positive detected by the fragment of the residual virus in the body, which is generally not contagious. Secondary infection generally occurs within a few months to one year after the first infection, which is equivalent to a new infection. Generally, there are clinical symptoms, and the viral nucleic acid load is high and contagious.
"Patients with 'Fuyang' do not need to be treated anymore, they just need to pay attention to rest, reasonable diet and nutrition." Zhang Boli reminded that patients with secondary infections need to receive standardized treatment again, and must strictly protect themselves, do self-isolation, and pay attention to the protection of family members and colleagues to reduce the risk of epidemic spread.
recommends that "Yangkang" receive the new crown vaccine after 6 months
"Although it is unlikely to be infected with the same new coronavirus variant strain again in a short period of time, people with poor immunity are prone to repeated infections, including the elderly, infants, and the elderly. People with underlying diseases and people with immunodeficiency are at risk of secondary infection in the short term, especially when faced with new mutant strains. "Zhang Boli said that in addition, people in high-risk positions such as doctors and nurses are in work environments with high risk of transmission, are exposed to many mutant strains, work intensively, and are at high risk of secondary infection.
"It is mainly a re-infection of the new coronavirus mutant strain, so personal protection must continue after the infection turns negative." Zhang Boli emphasized that "Yangkang" can be vaccinated with the new coronavirus vaccine after 6 months. It is best to adopt a sequential strategy and inject heterogeneous vaccines to strengthen the immune barrier .
For those who have recovered from the new coronavirus , the best way to prevent secondary infection during the epidemic is to implement protective measures, including wearing masks, paying attention to hand hygiene, taking breaks, ventilating frequently, maintaining social distance, etc. Especially for the elderly and children with "positive to negative" patients, they should keep warm, gather as little as possible, ensure good hygiene habits, pay attention to nutritious diet, enhance immunity and reduce the risk of reinfection.
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Additional reading
"White lung" has become a hot word that everyone is talking about
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It is worth noting that in this cold winter when medical treatment is at its peak, "white lung" has gradually become a hot word that everyone is talking about.
"White lung" is also called acute respiratory distress syndrome (ARDS). It generally refers to the performance of patients with severe pneumonia under X-ray or CT examination. The lungs are revealed to be a large white area, so it is named after it. The formation of white lungs generally indicates that the lungs are infiltrated by inflammation. The clinical manifestations are chest tightness, shortness of breath, and difficulty breathing. Patients with white lung have low blood oxygen saturation, which can lead to severe hypoxia. It is mainly caused by bacterial infection in the lungs or the body's inflammatory response.
Specifically, after a large amount of inflammatory factors leak out from the human body, it will cause damage to organs with rich blood supply such as liver, kidney, and lungs. The most important manifestation is damage to the alveolar epithelial cells and the capillary endothelium in the alveoli interval. , which in turn will lead to a large amount of leakage of some interstitial fluid in the capillaries, leading to pulmonary edema. Some of the interstitial fluid will directly penetrate into the alveoli, causing changes in the transparent lung membrane, leading to the occurrence of white lungs.
At the State Council Joint Prevention and Control Mechanism press conference held on the afternoon of December 27, Jiao Yahui, Director of the Medical Affairs Department of the National Health Commission, introduced the situation related to white lung.
Recently, the media contacted Zhang Li, deputy chief physician of the Respiratory Care Unit of Shanghai Pulmonary Hospital affiliated to Tongji University , and Gong Zilong, deputy chief physician of the Department of Respiratory and Critical Care Medicine of the Fifth Hospital of Wuhan, Hubei Province, two front-line doctors to explain issues related to "white lungs".
Gong Zilong also reminded everyone to pay special attention to the occurrence of "silent hypoxia", that is, "happy hypoxia". The patient does not have clinical symptoms such as chest tightness and shortness of breath, but in fact the lungs are severely hypoxic. This phenomenon mostly occurs in the elderly.
As for whether COVID-19 will cause white lung, two experts believe that COVID-19 will indeed affect human lungs, but the probability of causing white lung is not very high.
Gong Zilong said that white lung cannot be prevented, it can only be said to be an early warning. You can prepare an oximeter at home to monitor blood oxygen saturation, especially for patients with underlying diseases and the elderly. Monitor the oxygen saturation in a timely manner. Once you find that the blood oxygen saturation at rest is lower than 93%, you should seek medical treatment in time.
What should I do if there is no oximeter? In fact, if the blood oxygen saturation is low to a certain level, our brain center will sense it and have a compensatory response. It will increase the intake of oxygen through enhanced breathing exercises, so they will feel short of breath and chest tightness. The elderly may be slow to react and confused. In addition, cyanosis may occur on the lips and nails. If you have no underlying diseases and develop such symptoms after being infected with the new coronavirus, you need to be highly vigilant about whether there are lung lesions. If you are still accompanied by persistent fever, cough, chest pain and other unrelieved symptoms, it is recommended to go to a medical institution for a CT examination as soon as possible.
In addition, for some patients, especially those with underlying diseases, such as the elderly, chronic obstructive pulmonary disease, bronchial disease, lung cancer, heart failure, , and renal failure, special care must be taken as they may be critically ill. At this time, a lung CT is very necessary.
China Youth Daily (ID: zqbcyol Organized by: Chen Yinshan) Comprehensive: Science and Technology Daily (reporter Chen Xi), People's Daily client, CCTV News, Shangguan News, The Paper
Source: China Youth Daily
