Viral sinus infections can be contagious and usually last seven to 10 days. Bacterial sinus infections typically are not contagious and may need antibiotics. Stay home if you have a fever and wait ...

Lyme disease is spread through a tick bite. Lyme disease is not contagious or spread from one person to another through touch or saliva. The bacteria that cause Lyme disease can live in the blood.

Those infected with the flu are most contagious during the first three days, the CDC said. In some cases, however, people can spread the flu even before experiencing symptoms or up to five to seven ...

Skin cancer cannot transmit from person to person. It is not contagious and cannot spread through touch, contact, or any other means. Skin cancer is a type of cancer that begins in the skin cells. It ...

The tonsils are an integral part of the body’s immune function. They are the body’s first defense mechanism against germs and viruses that enter the body through your mouth, per Mayo Clinic.