What condition does a virus cause in the body?

A virus causes an infection in the body, which is characterized by the presence of the virus multiplying and triggering an immune response. This infection is often managed by treating the symptoms because, unlike bacterial infections, viral infections do not have specific antibiotic treatments available for most cases. Instead, the body typically fights off the virus through its immune system, with symptom relief being the primary method of care (such as managing fever, pain, and dehydration). Thus, the choice that highlights the treatment of the infection based on symptoms accurately describes the nature of a viral infection and the common medical approach to it.