Colds and flu are viral illnesses that infect your upper respiratory tract, causing symptoms such as chest congestion, runny nose, watery eyes and cough. Influenza, more commonly known as the flu, can also cause fever, nausea and vomiting. The average adult is sick with the common cold two to four times each year. Another 15% to 20% get the flu.
The influenza virus affects the respiratory system. Most people’s immune systems will be able to handle the virus effectively, but:
- It can be dangerous.
- Thousands die each year from severe illness or complications
from the virus.
- It is contagious.
- According to the Centers for Disease Control and Prevention,