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The longest a person has survived after a heart transplant is 24 years.
The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.
Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.