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Viral pneumonia can be caused by influenza virus, respiratory syncytial virus (RSV), and the herpes or varicella viruses, including those that cause the common cold (parainfluenza and adenoviruses).
- Influenza A and B usually occur in the winter and spring. In addition to the respiratory symptoms, you can get headache, fever, and muscle aches. Your chance of catching the flu falls a lot (but is not totally prevented) if you get a "flu shot" every year.
- Respiratory syncytial virus (RSV) is most common in the spring. It usually infects children and can cause outbreaks in daycare centers.
- Herpes or varicella pneumonia are rare unless you are infected with chickenpox.
- Adenovirus and parainfluenza viral pneumonias are often accompanied by cold symptoms such as runny nose and pinkeye (conjunctivitis).
- Although the specific pathogen responsible for SARS has not been identified as of March 19, 2003, a viral etiology is believed to be responsible.
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