+Ad4 is a specific [Adenovirus](/wiki/adenovirus) serotype, commonly associated with acute [Respiratory Disease](/wiki/respiratory_disease). It is a well-studied strain known to cause symptoms ranging from the common cold to pneumonia.
+## See also
+- [Virus](/wiki/virus)
+- [Infection](/wiki/infection)
+- [Common Cold](/wiki/common_cold)
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