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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.
The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.