Like any disease or parasite,viruses need to reach new hosts to extend the infective cycle,which explains why such a large number of viral infections are associated with the

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The digestive and respiratory systems are responsible for intake of external substances (such as food or air), making them highly susceptible to viral infections. Viruses can easily spread through contact with bodily fluids, coughing, or sneezing, making respiratory illnesses such as the flu or common cold common viral infections. Additionally, viruses that target the digestive system, such as norovirus, can spread through contaminated food and water. While viral infections can affect multiple systems in the body, the highest concentration of infections are associated with the digestive and respiratory systems.

Like Any Disease or Parasite,viruses Need to Reach New Hosts