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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.
Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.