Are pneumonia symptoms contagious?

Written by Yang Feng

Pulmonology

Updated on May 05, 2025

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The main clinical symptoms of pneumonia include chills, high fever, cough, expectoration, shortness of breath, chest pain, etc. Pneumonia is a common infectious disease of the respiratory system, and it can be transmitted through the respiratory tract. However, pneumonia is not classified as a contagious disease; it is merely an infectious disease. It tends to be more prevalent during the flu season, so pneumonia is contagious, but it is not considered a contagious disease.

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Is pneumonia serious?

Is pneumonia serious, and what will happen if it worsens or goes untreated? Severe pneumonia can lead to septic shock and can even be life-threatening. If pneumonia is not treated or not treated thoroughly, it can deteriorate into the following conditions: First, it can cause lung abscesses and empyema, and even lead to pericarditis, meningitis, and more; Second, the infection can enter the bloodstream, causing bacteremia and even septic shock; Third, the patient's continuous high fever can lead to febrile convulsions and even the possibility of coma; Fourth, extensive pneumonia can reduce the function of the alveoli, causing hypoxia and carbon dioxide retention. Hypoxia can affect the function of the nervous system, and patients with severe pneumonia may experience drowsiness, irritability, and even convulsions and coma.

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How many doses are there for the pneumonia vaccine?

Currently, there are two types of vaccines commonly used to prevent pneumococcal diseases. One type is the 23-valent polysaccharide vaccine, suitable for high-risk populations over two years old. The other type includes the 7-valent or 13-valent conjugate vaccines, used for vaccinating infants under two years old. The vaccination schedule for the 7-valent or 13-valent vaccines follows a "three plus one" program, which means three primary immunization doses with at least one month between each dose, followed by a booster dose. For the 23-valent vaccine, high-risk individuals over two years old generally require only a single dose; however, immunocompromised patients may need a booster shot, typically recommended five years after the initial vaccination.

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What can you eat with pneumonia?

What can pneumonia patients eat? Pneumonia is usually an acute illness, often accompanied by symptoms such as excessive phlegm, cough, shortness of breath, and chest pain, which demand strict dietary considerations. A good diet ensures that pneumonia patients get enough fluids and calories, which helps in the treatment of pneumonia. Patients can consume foods rich in quality protein, high calories, and vitamins, such as eggs, animal liver, cornmeal, buckwheat flour, and a moderate amount of fruits and vegetables. Foods like black fungus, seaweed, kelp, and mushrooms can also be included more frequently. It is important for patients to drink plenty of water. Pneumonia patients may experience fever and sweat a lot; drinking more water can help replenish fluids in a timely manner, prevent excessive loss of fluids, and more frequent urination helps in faster elimination of metabolic waste from the body, aiding in the recovery from the disease.

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Pulmonology

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Adult pneumonia symptoms

The main clinical symptoms of pneumonia include cough, expectoration, asthma, chest pain, chills, high fever, etc. If the pneumonia patient has some complications from other systems, symptoms like nausea, vomiting, diarrhea, and dizziness may also occur. Once pneumonia is diagnosed, active antimicrobial treatment is necessary, and pneumonia can be cured. Additionally, for patients with low immunity or those who frequently suffer from respiratory diseases, annual influenza and pneumonia vaccinations can be administered for preventive measures.

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What department should I go to for pneumonia?

Pneumonia, as the name suggests, is inflammation of the lungs and belongs to the category of respiratory diseases. Therefore, the primary department to consult is Respiratory Medicine. In places where there is no Respiratory Medicine department, such as community health service centers or township health clinics, patients would have to consult the general internal medicine department instead. Of course, if the symptoms of pneumonia are severe and the condition is critical, and it happens outside of regular outpatient hours, then the patient must be seen by the emergency medicine department. The emergency medicine department will manage and triage pneumonia patients, and then decide their next steps, such as whether to transfer them to the ICU, a regular Respiratory Medicine department, or keep them for observation in the emergency department.