Why do some people with COVID-19 have no symptoms?

A little over a year after the emergence of the first case of COVID-19 in Wuhan, even specialists are trying to better understand this virus than it has affected millions of people around the world.

One of the most curious situations in relation to this virus is its unpredictability; it causes symptoms of varying intensity in people. Thus, some patients may have very serious signs, others mild, and a group of those affected may have no symptoms at all.

Researchers have conducted research on this asymptomatic group of patients and give us some answers regarding the very nature of COVID-19.

The absence of symptoms in those infected by COVID-19

It is well known that COVID-19 has become a global pandemic as a result of its high contagion; But in addition to this, this virus manages to hide in the body for several days without being detected by the immune system. A person infected with COVID-19 does not present signs during the first days and may not show them; however, it infects the people around it. This factor has been fundamental in the spread of the virus.

Although the health consequences of the spread of COVID-19 are serious, the absence of symptoms also means a serious problem. The reason is that a person who does not show signs has a greater chance of infecting more people around him. For this reason, specialists have been concerned to understand the reason why this virus acts in this way in certain organisms.

According to various investigations, it has been detected that a fifth of those infected by COVID-19 do not present any symptoms; however, the viral load sufficient to infect others is present in the body. The question is why these people are asymptomatic with the virus present in their body.

COVID-19 hides from the immune system

COVID-19 has proven to be a virus that has the ability to camouflage itself very well; For this reason, most patients do not develop signs until 10 days after infection. Time during which the patient infects those around him. Some of these people later present symptoms of varying intensity and others none in particular.

The reason why there are such varied levels of symptoms and health effects is because of the ability of this virus to hide from the immune system. When the lungs are affected by a virus; For example, influenza, alveolar macrophages detect it and produce a protein called interferons that starts the battle against the virus, causing symptoms. This is the body's natural response.

However, this is not the case with COVID-19. This virus has the ability to hide itself and completely neutralize or delay the immune response. Which explains the variability in the level of symptoms.

There is still much to know about this virus and so far the best weapon to combat it, continues to be staying informed and self-care.