Chest X-ray is not routinely done in patients with influenza.  A chest X-ray is useful to assess complications of influenza infection, such as a superimposed bacterial pneumonia.
Influenza chest x ray
Avian influenza chest x ray
Anthrax chest x ray
Pertussis chest x ray
Influenza physical examination
Avian influenza physical examination
COVID-19 x ray
Tuberculosis chest x ray