B97: Viral agents as the cause of diseases classified to other chapters

The group of conditions under the category "Viral agents as the cause of diseases classified to other chapters" essentially refers to diseases that are caused by various types of viruses. These diseases can impact multiple body systems, depending on the specific type of virus. Viruses are tiny infectious agents that can only reproduce inside the cells of a host organism, like humans. They are transmitted in numerous ways such as through air (coughing or sneezing), contact with infected individuals, exposure to virus-contaminated surfaces or objects, consumption of contaminated water or food, or via vectors like insects. Symptoms depend on the specific disease caused by the viral agent, but often include fever, fatigue, body aches, and may also involve the respiratory, gastrointestinal, or central nervous systems among others. Disease progression can range from mild to severe, including potentially life-threatening manifestations in some instances. It is noteworthy that these viral diseases can be detected and often treated, although the best approach to management depends on the particular virus and resultant disease.