What complication can arise from viral infections and other factors?

Pneumonia is a common complication that can arise from viral infections, particularly when the infection leads to inflammation of the lungs and impairs the body's ability to fight off secondary bacterial infections. Certain viruses, such as influenza and COVID-19, can cause severe respiratory issues that might lead to pneumonia.

Pleurisy is another complication that can occur when viruses cause inflammation of the pleura, the membrane surrounding the lungs. This condition can lead to sharp chest pain and difficulty breathing, often resulting from viral infections leading to pneumonia or lung inflammation.

Lung cancer is more complex; while it’s not a direct complication of viral infections, certain viral infections like those caused by the human papillomavirus (HPV) or other oncogenic viruses can increase the risk of developing lung cancer over time due to genetic mutations.

By considering these factors, it becomes clear that viral infections can lead to various complications, including pneumonia and pleurisy directly, and they can also contribute to long-term risks such as lung cancer. Therefore, noting that all these ailments can be associated with viral infections highlights the broader impact of these pathogens on respiratory health.