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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Written by Wang Xiang Yu

Pulmonology

54sec

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What department does pneumonia go to?

What department should I go to for pneumonia? Pneumonia, as the name suggests, is a lung disease, which is to say it is a disease of our respiratory system. Therefore, the most appropriate department to visit would be the Department of Respiratory Medicine. If the patient's condition is relatively stable, they can visit the outpatient Respiratory Medicine department. Of course, there are a small number of patients whose condition is very critical, and in such cases, they must first visit the Department of Emergency Medicine. The doctors in Emergency Medicine will decide based on the patient's condition whether their next step should be to go to Respiratory Medicine, be admitted for in-hospital treatment, remain in the emergency for observation, or need to be admitted to the ICU for further emergency treatment.

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Written by Wang Xiang Yu

Pulmonology

1min 24sec

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Can pneumonia vaccines prevent mycoplasma pneumonia?

Can pneumonia vaccines prevent Mycoplasma infections? First, we need to understand what pneumonia vaccines are. In our country, the most commonly used pneumonia vaccines are aimed at Streptococcus pneumoniae, which are divided into polysaccharide vaccines and conjugate vaccines. Polysaccharide vaccines are mainly suitable for individuals over two years old and include the 23-valent polysaccharide vaccine. This vaccine can prevent infections caused by twenty-three serotypes that often lead to S. pneumoniae infections, with over 90% of pneumonia caused by these twenty-three serotypes. However, the 23-valent polysaccharide vaccine does not prevent infections caused by other serotypes of S. pneumoniae. Additionally, the conjugate vaccine only prevents infections caused by either seven or thirteen serotypes. Since Mycoplasma is neither a bacterium nor a virus, it cannot be prevented by pneumonia vaccines, and currently, there is no vaccine available specifically for Mycoplasma infections.

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Written by Li Jiao Yan

Neonatology

50sec

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Can pneumonia vaccines prevent mycoplasma pneumonia?

There are currently two types of pneumonia vaccines available domestically: the 23-valent polysaccharide vaccine and the 7-valent or 13-valent vaccines. These vaccines primarily prevent infections caused by certain serotypes of Streptococcus pneumoniae. The pneumonia vaccines cannot prevent Mycoplasma pneumonia, as Mycoplasma and Streptococcus pneumoniae are two different types of pathogens and do not share the same antibodies for protective effects. Thus, the pneumonia vaccines are mainly for preventing diseases related to Streptococcus pneumoniae infections, and are ineffective against Mycoplasma pneumonia.

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Written by Hu Xue Jun

Pulmonology

1min 58sec

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Types of Pneumonia

Now let's talk about what pneumonia is and its classification. Pneumonia refers to inflammation of the terminal airways, alveoli, and pulmonary interstitium. It can be caused by pathogenic microorganisms, physicochemical factors, immune damage, allergies, and drugs. Bacterial pneumonia is the most common type of pneumonia and is also one of the most common infectious diseases. The classification of pneumonia generally involves several aspects: First is the anatomical classification: from an anatomical perspective, it can be divided into lobar pneumonia (alveolar pneumonia), bronchopneumonia (bronchial pneumonia), and interstitial pneumonia. Second, the classification based on etiology, which mainly includes the following aspects. The first is bacterial pneumonia, which includes Streptococcus pneumoniae pneumonia, Staphylococcus aureus pneumonia, Klebsiella pneumoniae pneumonia, Haemophilus influenzae pneumonia, Pseudomonas aeruginosa pneumonia, and Acinetobacter baumannii pneumonia, etc. The second point is pneumonia caused by atypical pathogens such as Legionella, Mycoplasma, and Chlamydia. The third is viral pneumonia. The fourth refers to fungal diseases or fungal pneumonia. The fifth is pneumonia caused by other pathogens: such as rickettsiae, parasites. The sixth is pneumonia caused by physicochemical factors: such as radiation pneumonia, inhalational pneumonia, and lipid pneumonia. The third category is classification by the environment of illness, which can be divided into two types: the first is community-acquired pneumonia, and the second is hospital-acquired pneumonia.

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Written by Wang Xiang Yu

Pulmonology

1min 8sec

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What are the symptoms of pneumonia?

Pneumonia can have many manifestations, and each person's symptoms can be different. It is highly heterogeneous, varying from mild to severe and can last for short or long durations. The main factors depend on the type of pathogen involved and the state of the body. The most common symptoms of pneumonia are coughing and producing sputum. The cough can be mild or severe and may be accompanied by sputum. The amount of sputum can vary and may be yellow, green, red, or rust-colored. Other possible symptoms include chest pain, difficulty breathing, respiratory distress, and most cases of pneumonia also involve fever. The duration and severity of the fever are somewhat related to the course of the illness. However, a small portion of patients may have atypical symptoms, especially older adults, who may not show direct respiratory symptoms but instead exhibit consciousness disturbances such as coma, confusion, fatigue, and more.