+Viral diseases are microscopic entities that replicate within living cells, hijacking host machinery to propagate. They manifest across a wide spectrum, from the familiar [Cold](/wiki/cold) to widespread [Pandemics](/wiki/pandemic), constantly evolving and challenging host defenses.
+## See also
+- [Virus](/wiki/virus)
+- [Infection](/wiki/infection)
+- [Immunity](/wiki/immunity)
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