Depending on the host's immune mechanism the coronavirus can either subside giving mild symptoms or else can lead to severe health complications. In case of COVID, the severity of the infection will require the patient to have oxygen or a ventilator support.
COVID pneumonia
Unlike the general pneumonia, COVID pneumonia takes hold of both the lungs. When COVID becomes COVID pneumonia the air sacs get filled with fluid. While many people recover from it without any serious damage to the lungs, the possibility of a serious consequence can not be ruled out. Health experts say even after one recovers from COVID pneumonia, the lung may not be completely healthy to function as normal and it may take months for the patient to breathe normally.
Sepsis
Sepsis is a life threatening condition in which the body's own defence mechanism damages its own tissues. The chemicals released into the bloodstream to fight against an infection actually causes inflammation in the body. This disturbs the coordination among organs. Experts say that even if a person recovers from sepsis, there are chances that the lungs will take more time to heal completely.
Acute Respiratory Distress Syndrome (ARDS)
This is a condition where the lungs are unable to provide oxygen to the vital organs of the body. COVID pneumonia progresses to this form of respiratory issue. ARDS is a fatal condition, but if people survive they might have to live with malfunctioning lungs for a longer duration.