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According to the US Centers for Disease Control and Prevention, up to 40 percent of COVID-19 cases are asymptomatic, with 20% of infected people exhibiting symptoms are particularly ill or even die.
The first symptoms of COVID-19 are fever and cough. Afterwards, patients often complain of a sore throat, headache, muscle and other aches and pains and may experience nausea or diarrhea. It should be noted that in cases where the disease is particularly complicated, gastrointestinal disorders can also occur in the early stages of the disease, writes the sciencealert.com portal.
Once the disease has started, patients often have difficulty breathing. This symptom, which is considered a typical coronavirus symptom, is usually registered around the fifth day of disease progression.
However, the listed symptoms do not usually appear immediately after infection. According to the Centers for Disease Control and Prevention, the average incubation period for COVID-19 is about five days.
Meanwhile, infected people generally do not yet know that they have contracted the virus. Unfortunately, even during the presymptomatic phase, the infection can spread.
Daily Symptom Analysis
Doctors who observed thousands of patients in Chinese hospitals earlier this year identified the most common symptoms of COVID-19 and indicated when they usually occur.
1 day. The first symptoms are insignificant. Patients usually have a fever. A little later they start coughing. Diarrhea or nausea may occur in some patients. The latest symptoms suggest a severe form of the disease.
Day 3. Wenzhou residents were taken to the hospital on average on the third day after symptoms appeared. Additionally, a study of more than 550 Chinese hospitals found that hospitalized patients developed pneumonia on the third day of illness.
Day 5. In severe illness, symptoms may worsen. Patients may have difficulty breathing, especially if they are elderly or have other health conditions.
Day 7. Uhane’s patients were transferred to the hospital on average on the seventh day after the onset of symptoms. Also on the seventh day of the illness, some infected residents of this city had difficulty breathing.
Day 8. Patients with severe COVID-19 should develop pneumonia, dyspnea, or acute respiratory distress syndrome (ARDS), which may require intubation. ARDS often ends in death.
Day 9. Some people in Wuhan have developed sepsis, an infection caused by an aggressive immune response.
10-11 days. If patients’ symptoms worsen, it is on these days that they are usually transferred to the Intensive Care Unit. Furthermore, these patients are more likely to complain of greater abdominal pain and loss of appetite than people with a milder form.
Day 12. In some cases, ARDs do not appear until two weeks after the onset of the disease. A study in Uhane found that it took an average of 12 days to transfer a patient to the Intensive Care Unit. The fever may disappear in recovering patients after 12 days.
Day 16. According to a study from Wuhan, the cough can pass that day.
17-21 days. Generally, within 2.5 to 3 weeks after the onset of infection, people in Uhane recovered from the coronavirus and were either discharged from the hospital or died.
Day 19. Based on the findings of Uhane’s study, shortness of breath may go away that day.
Day 27. Some patients stay longer in the hospital. The average length of hospitalization in Wenzhou is 27 days.
Of course, if a patient is discharged from the hospital, it does not necessarily mean that his symptoms have completely disappeared. Some patients have reported symptoms that have affected them for more than a month, such as chest pain, shortness of breath, nausea, rapid heart rate, and loss of taste and smell. People who develop COVID-19 but are not hospitalized can also experience long-term symptoms.
In July, researchers from the Centers for Disease Control and Prevention wrote in their report that 35 percent of nearly 300 patients were symptomatic. the patients’ health did not return to normal two to three weeks after a positive result.
After a few weeks, patients who felt better reported that their symptoms generally resolved within four to eight days after being tested for the coronavirus. Taste and smell sensations returned more slowly, on average within eight days.
COVID-19 may be more of a vascular disease than a respiratory disease
Although the coronavirus primarily attacks the lungs, it can infect the heart, kidneys, liver, brain, and intestines. The results of some studies suggest that COVID-19 is a vascular disease, not a respiratory tract, meaning that the coronavirus can travel in blood vessels. This is why additional complications sometimes occur, such as heart damage or stroke.
Researchers have various theories as to why the health of some people infected with coronavirus is rapidly deteriorating. One of them is an over-response from the immune system or a “cytokine storm” – chemical signals that tell the body’s immune cells to destroy healthy cells.
Dr., a pulmonologist at Johns Hopkins Bayview Medical Center. Panagis Galiatsatos compared this process to an earthquake. After all, people generally die not from shaking the earth, but from collapsing buildings.
“The infection shook the immune system,” he said. “If your immune system is not in good condition, it will deteriorate.”
The most worrisome symptom is shortness of breath.
More attention should be paid to some symptoms of the disease when coronavirus symptoms occur.
“I’ve always asked first if a person is having trouble breathing, because in that case, immediate help is needed,” said Megan Coffee, an infectious disease doctor who analyzed the data in Wenzhou.
Patients who develop ARD may need to be connected to a lung ventilator in the Intensive Care Unit. Mr. Coffee estimated that one in four hospitalized COVID-19 patients ended up in the Intensive Care Unit. According to the doctor, those discharged from the hospital will need another month of rest and rehabilitation to fully recover.
It is true that when analyzing coronavirus infections based on the media, one can inadvertently overlook the fact that the disease does not always progress in a linear fashion.
“There may be a gradual deterioration in health. One day the patient may feel better, the next, worse,” explained M. Coffee. “On the other hand, an 80-year-old man with other health problems may not complain too much about symptoms of the coronavirus, but a 40-year-old woman who does not have any other disease will suffer greatly. “
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