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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.
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
Blood is approximately twice as thick as water because of the cells and other components found in it.