Flu Symptoms In Adults 2024. Influenza (flu) is a highly contagious respiratory illness. Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system.
Dear colleagues, flu vaccination remains a critically important public health intervention to reduce morbidity and mortality in those most at risk including older people, pregnant. *itโs important to note that not everyone with flu will have a fever.