Recently, with the opening and adjustment of the Covid-19 epidemic prevention policy, the covid patients who experienced the peak of the first wave of infection have gradually recovered. People said that although the nucleic acid has turned negative, they still feel fatigued and have difficulty breathing. The major online platforms even have information about sudden death due to strenuous exercise or lung infection and "white lung" symptoms after covid, which triggered heated discussions among netizens

Under normal circumstances, patients infected with the Covid-19 virus usually have symptoms of cough, dry cough, sore throat, nasal congestion, and runny nose. At the same time, they may be accompanied by symptoms related to upper respiratory tract infection such as poor breathing. Unexpectedly, this is the inflammation of the trachea and bronchi caused by the infection of the new coronavirus. The human body expels the secretions of the trachea and bronchus through coughing and expectoration. This inflammation is a normal manifestation of the body's own immune defense mechanism, but the immune system while killing the virus, the cells may also cause trauma to their own organs, resulting in pathological changes in the lungs, causing viral pneumonia, and in severe cases, "white lungs" will appear. 

Especially for the elderly with low immunity and young children with immature immune systems, more attention should be paid. In addition, for patients with underlying diseases, such as bronchial disease, renal failure, heart failure, lung disease, etc. It is even more necessary to go to the hospital for a lung CT examination to avoid deterioration of the condition.

After being infected with Covid-19, it will not only affect the respiratory system, but may also affect other organs such as the digestive system, circulatory and urinary systems, and the heart. Especially in the late stage of the new crown infection and after 1-2 weeks, there will be an increase in heart rate and myocardial markers, which will increase the incidence of myocarditis.

After the Covid-19 infection, when the patient enters the recovery period, the immunity is low, and it takes a certain period of time for the antibody to be produced. Winter is the season of the high incidence of respiratory diseases, and other respiratory viruses also increase the survival rate and infectivity due to the low-temperature environment. At this time, more attention should be paid to improving autoimmunity strength to avoid infection.

Following the opening of the Covid-19 epidemic prevention policy, there was an upsurge of "hunting medicine" among the people, followed by improper use of various medicines such as cold medicine, antipyretics, and anti-inflammatory medicines after infection, resulting in the indiscriminate use of medicines. Liver and kidney damage, drug poisoning, allergies, and aggravated illnesses occurred, and such news was reported in major news media. In severe cases, symptoms such as acute liver injury, kidney injury, gastric mucosal injury, and neurological disorders may also appear.

Many people infected with the Covid-19 virus said that after infection, they experienced symptoms of loss of taste and smell, and no taste in food, and no smell. Of course, most people will gradually reduce their symptoms as the new crown virus infection progresses, and eventually recover on their own to normal conditions. However, there are also a very small number of people whose sense of taste and smell has not recovered after a month. At this time, they need to go to the hospital for relevant examinations.

Secondly, after understanding the hidden health risks that may arise after Covid -19 infection, what also needs to be known is what should people do in the face of these hidden dangers. Then it is recommended to go to the hospital for targeted related examinations to screen possible health problems after recovery, prevent and adjust them in time, help the body recover to the best health state, and avoid delaying treatment time due to neglect of one’s own health status, causing harm to the body varying degrees of injury. According to the related health hazards after covid, it is suggested that people go to the hospital or clinic for lung CT to check the damage to the lungs and whether there are other symptoms such as inflammation or white lung. 

In addition, examinations such as myocardial enzymes, liver, and kidney function tests, electrocardiograms, myocardial injury markers, chest CT, and immunoglobulin can also help to better troubleshoot hidden dangers and have a more comprehensive and clear picture of your own health status.

Prevention is still the main priority, and if there is a disease, it can be followed up and treated in time.

To sum up, people infected with the Covid-19 virus should not take it lightly after getting sick with it. They need to pay attention to their physical condition at all times, wear masks when going out, maintain social distancing, wash their hands frequently; pay attention to ventilation at home, and carry out proper disinfection. Maintain a balanced diet, and after two weeks of recovery, exercise properly to improve immunity. During this period, in order to ensure the recovery of the body's immunity and avoid other health problems in the future, you should go to see your doctor to do a health screening.