Difference between Viral Pneumonia and COVID-19 Pneumonia

Written by Yuan Qing
Pulmonology
Updated on June 30, 2025
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The differences between viral pneumonia and COVID-19 begin with their names. Viral pneumonia is a broad concept, referring to lung inflammation caused by any respiratory virus, whereas COVID-19 specifically refers to the pneumonia caused by the novel coronavirus that emerged in 2019. Additionally, regarding symptoms, viral pneumonia can cause fever, cough, and sputum production, but rarely progresses to severe disease. On the other hand, treating COVID-19 is challenging as there are no specific drugs available, and a significant portion of patients may develop severe illness. Furthermore, in terms of prognosis, there are many vaccines available that provide protection against viral pneumonia, whereas, as of now, there is no vaccine available for COVID-19.

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Written by Hu Xue Jun
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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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"Does a weakly positive Mycoplasma pneumoniae indicate pneumonia?"

During the testing process, if Mycoplasma pneumoniae shows a weakly positive result, this does not necessarily indicate that the person has pneumonia. A weakly positive result for Mycoplasma pneumoniae only suggests a possible infection, but does not confirm pneumonia. If there is a suspicion, further investigation, such as chest radiography, should be conducted. If chest radiography reveals changes in lung patterns or patchy areas in the lungs, then it can be considered that the person may have Mycoplasma pneumoniae pneumonia. If the chest radiography is normal, it cannot be concluded that the person has pneumonia.

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Written by Li Jian Wu
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Can pneumonia recur?

Can pneumonia recur? It should be decided based on an individual's constitution. If one has normal immunity and a good constitution, generally, it will not recur after recovery. If one is frail or has low immunity, there is also a certain chance of recurrence clinically. Therefore, it is important to timely adjust the constitution and enhance immunity. One should drink more water, quit smoking and alcohol, avoid exposure to smoke, dust, second-hand smoke, and irritating chemicals, and do more aerobic and endurance exercises. This can help improve the body's immune capabilities and aid in disease recovery.

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Written by Wang Chun Mei
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Do you have a runny nose with pneumonia?

In clinical settings, pneumonia patients exhibit varying accompanying symptoms depending on the type of pneumonia. Particularly in very young infants, the early symptoms might primarily include nasal congestion, runny nose, sneezing, and even fever, without obvious coughing symptoms. In some newborns, pneumonia can be diagnosed through auscultation at this stage. In adults, certain types of pneumonia, such as those caused by viral infections, may not receive timely and effective anti-infective or antiviral treatment initially. In these cases, the condition can worsen and spread, leading to pneumonia, with some patients also experiencing symptoms of a runny nose. Of course, conditions like most cases of mycoplasma pneumonia, bacterial pneumonia, and lung abscesses that cause pulmonary inflammation usually do not involve a runny nose. Therefore, in clinical practice, if pneumonia is accompanied by a runny nose, it is usually due to specific circumstances of the illness.

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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.