Viral Diseases are spread by viruses, a type of microorganism. There are many types of viruses that cause various viral infections. The most common type of viral infection is a common cold, caused by an infection of the upper respiratory tract (nose and throat). Viral infections are contagious and spread from person to person when the virus enters the body and begins to multiply. Viral infections lead to a variety of symptoms that vary in personality and severity depending on the type of infection and other factors, including age and overall health. Common symptoms of viral infections include symptoms such as fever and malaise.

Viral infections are incurable, which can cure viral and bacterial infections. However, the most common infections caused by viruses, common colds and flu, stop them from healthy people. This means that the virus causes a temporary illness, and then the symptoms disappear as your immune system attacks the virus and your body recovers.