Within a few days after the corona virus enters an infected person, it spreads from the respiratory system to the heart, brain and almost all organs of the body, where it can remain for many months.
The discovery was made in a medical study conducted in the United States.
Research by the US National Institutes of Health is being hailed as the most comprehensive analysis of the corona virus to date, examining the spread and persistence of the virus in the body and brain.
Research has shown that the virus has the ability to replicate itself inside human cells in organs other than the respiratory system.
Research has shown that the presence of the virus in the human body for several months is a possible cause of long-term symptoms, which is why the term long code is used for infected people.
The researchers said that understanding the mechanisms of virus transmission and the physiological response to any viral infection could help improve the care of people infected with the long code.
"This is a very important task," he said. Explained why people who experience the slightest severity of codes also experience long codes.
Various research reports in the past have provided evidence that the corona virus can infect cells in other parts of the body, beyond the lungs and respiratory system.
The study examined samples and tissues of 44 patients who died from COD 19 in 2020.
The researchers also discovered the RNA sequence of the corona virus in several parts of the body, including different parts of the brain, several weeks after the onset of symptoms (maximum 230 days).
This indicates long-term symptoms of the disease, as is the case with people infected with the measles virus.
The researchers also used a variety of techniques to protect these tissues so that the presence and number of viruses could be checked over time.
He said the results show that initially the corona virus carries the greatest burden on the respiratory system and lungs, after which the virus begins to infect cells throughout the body.
He suggested that in the early stages, the virus is present in the bloodstream and spreads throughout the body through it, but also crosses the barrier between the blood and the brain.
This also happens to patients with mild to moderate illness or no symptoms.
The researchers said that the lack of clearance of the virus outside the lung system could be the result of a weakened immune response.
He said that focusing on the various parts of the patient's brain can be helpful and help them to understand why they are experiencing mental retardation or mental fog and other problems.
"We need to consider whether the corona virus is a systemic virus that clears up in some people but in most cases it can last for weeks or months and cause long-term symptoms," he said.
The results of this study have not yet been published in any medical journal but have been published online.
