How long does it take to not be contagious after pneumonia has healed

The clinical criteria for recovery of pneumonia are clinical symptoms, loss of pathogenic bacteria and lung rales that cause pneumonia, and absorption of lung spots and patchy shadows on chest x-ray, in which case they are generally no longer infectious.Generally, pneumonia is no longer contagious after recovery.

Pneumonia can be divided into infectious pneumonia and non-infectious pneumonitis. Clinically non-infectious pneumonia, such as falling pneumonia, organizing pneumonitis, radiation pneumonitis, etc., is not caused by pathogenic bacterial infection, and is not contagious even during the onset period. However, if it is caused by pathogenic bacteria such as bacteria, viruses, and mycoplasma, pneumonia is usually contagious. For example, Streptococcus pneumoniae pneumonia, mycoplasma pneumonia, etc., pathogenic bacteria mainly exist in the patient's body fluids and secretions, and can be transmitted through droplets. If the symptoms of pneumonia improve, but the pathogen has not been completely eliminated, it can still be transmitted through droplets. When the pathogenic bacteria in the lungs are completely eliminated and the clinical symptoms and lung rales disappear, they are generally no longer infectious.

Patients with clinical pneumonia, especially pneumonia with highly contagious pathogens, should be isolated and treated in order to avoid infecting others. During the illness, it is recommended to eat a light diet, avoid greasy, spicy and irritating foods, eat more fresh vegetables and fruits, and drink water appropriately, which is conducive to the recovery of the disease.