“Focused on microglia, a type of immune cell that can be found in the brain and the spinal cord, these cells are known to play a role in the “volume knob” for pain.”

Jeffrey Mogil, a pain researcher at McGill University and a co-author of the study.

“Photosensitivity, sometimes referred to as a sun allergy, is an immune system reaction that is triggered by sunlight.”

Merck

“The routes of transmission of hepatitis D are similar to those for hepatitis B. Infection is largely restricted to persons at high risk of hepatitis B infection, particularly injecting drug users and persons receiving clotting factor concentrates.  The routes of transmission for hepatitis E is through ingestion of contaminated water or food.”

CDC

“Hepatitis C is an infectious disease affecting primarily the liver, caused by the hepatitis C virus (HCV). The infection is often asymptomatic, but chronic infection can lead to scarring of the liver and ultimately to cirrhosis, which is generally apparent after many years.”

CDC

“Hepatitis is a liver disease that is caused when the hepatitis C virus begins to attack. Some individuals become infected and completely recover, whereas others develop chronic hepatitis C which often leads to cirrhosis and a number of other serious complications.”

HealthPrep.com

“Arthritis is an informal way of referring to more than 100 types of joint diseases that affect 53 million adults and 300,000 children in the U.S.”

Arthritis Foundation www.arthritis.org

“The higher survival rates are largely due to medical treatment advances. The right care — right away — can save both lives and quality of life.”

American Heart Association

“Stroke happens at any age, yet many young people do not think a stroke could happen to them. Younger people may not recognize the symptoms, and there may be delay in diagnosis at the hospital because stroke is typically thought of as a condition that happens to older people.”

CDC Centers for Disease and Prevention

“Stroke is the fifth leading cause of death in the United States. The good news is that the overall number of strokes has gone down in recent years. But this is not true for a surprising number of adolescents and young adults.”

CDC Centers for Disease Control and Prevention