For most patients, Covid-19 begins and ends in the lungs because, like the flu, coronaviruses are respiratory diseases. They usually spread through the cough and sneeze of infected people, through micro-points that can transmit the virus to those in close contact.

Coronaviruses also manifest symptoms similar to those typical of influenza, which is why both diseases can be confused: patients, first, may have fever and cough, which then progress to becoming interstitial pneumonia. .

How does this coronavirus cause infection?

The virus spreads through points spread through the air by coughing or sneezing from infected persons, who are nearby and can inhale through the nose, mouth or eyes. The viral particles in these droplets travel rapidly to the back of the nose and to the mucosa within the throat, attaching to a specific receptor on the cells.

How does this process cause breathing problems?

Copies of the virus multiply, break down and infect cells. The first symptoms often start from the throat with sore throat and dry cough. Then the virus progressively creeps along the bronchi. When the virus reaches the lungs, their mucous membranes become irritated. This can damage the alveoli or lung sacs that need to work harder to perform their oxygen supply function to the blood that circulates throughout our bodies and removes carbon dioxide from the blood. Damaged oxygen leakage can cause those areas of the lungs to become filled with fluid, pus and dead cells causing pneumonia. Because of this degeneration, some patients suffer serious respiratory problems, such as having to be hospitalized in intensive care and ventilated. In the worst cases, when acute respiratory distress syndrome occurs, the lungs become so fluid that no respiratory support can help the patient who cannot breathe and dies.

For those who believe they are unaffected and continue to go out to the park without obeying the orders placed to stay home, we invite you to view the lungs of a 28-year-old first X-ray boy. The lungs are black, while white is pneumonia or infection fluid that subsequently blocks breathing. The images were published by a doctor in Spain called Donni.

Virus aggravation is very rapid and from day 12 to day 15 it is seen that the patient's lungs are filled with infection fluid.