What are the causes of pneumonia?

Common Causes of Pneumonia

In adults, the primary viral agents responsible for pneumonia are the influenza virus (flu) and the rhinovirus, which typically causes the common cold. For young children, the respiratory syncytial virus (RSV) is the leading culprit behind viral pneumonia. Additionally, several other viruses, including SARS-CoV-2, which is known for causing COVID-19, can also lead to pneumonia.