A highly contagious virus that causes respiratory tract inflammation with cold-like symptoms
The common cold is probably the most universal illness. It is a viral infection of the upper respiratory tract, which includes the nose and throat area.
Measles is one of the world’s most contagious diseases, and it can be especially dangerous for children under age 5 or for those with weakened immune systems.
A common virus that often spreads during the wintertime, the flu can become a serious condition, especially for the elderly.