The flu (influenza) is a contagious respiratory illness caused by viruses. Symptoms often include fever, cough, sore throat, and body aches. While usually mild,...
The flu, or influenza, is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes the lungs.
The flu primarily spreads through droplets released when an infected person coughs, sneezes, or talks, which can be inhaled by others nearby.
Common symptoms include fever, cough, sore throat, body aches, headache, chills, and fatigue. Some people may also experience vomiting and diarrhea.
The most effective prevention is getting an annual flu vaccination. Other measures include frequent handwashing, avoiding touching your face, and staying home when sick.