influenza ranges between acute and mild severity, it also is a contagious respiratory illness attacking the lung throat and nose. It spreads from droplets in sneezes and coughs. which with chronic illnesses can be very dangerous because of their weak immune system.
prevention is as simple as a yearly vaccination and not spreading it yourself can help the liquidation of it in your system(this included washing your hands under the circumstances of coughing and sneezing)
some signs and treatment
some possible signs are coughing, a fervent temperature, clammy hands and fatigue in the body or aching. treatment is very simple and has minimal amount of pain, which is a annual flu shot.