Mononucleosis (mono) is a viral infection of the lymph nodes. Main symptoms are sore throat and widespread swollen lymph nodes

Bites from a mosquito cause itchy, red bumps. Often they look like a hive.

Symptoms triggered by a spinning, rocking or rolling motions. The main symptoms are dizziness and nausea

Symptoms that occur with travel to a high altitude. Starts at 8,000 feet (2400 meters) above sea level or higher. Also called Altitude Sickness.