The body’s immune system is constantly fighting a war against pathogens such as viruses, bacteria and even parasites.

The immune system is very good and "wins" most of the time, but you are quite right that symptoms like a low-grade fever, ...

Though symptoms of a cold and the flu are similar, the two illnesses develop at different rates, with colds often beginning ...

Enterovirus infections often cause no symptoms or mild flu-like symptoms. Though rare, they can lead to serious complications. Children and people with weaker immune systems are most at risk.

Though symptoms of a cold and the flu are similar, the two illnesses develop at different rates, with colds often beginning slowly and the flu taking hold more quickly. Colds are typically a mild ...