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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

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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.

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Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Examples of cell-to-cell communication based on the distance between cells Examples of cell-to-cell communication based on the distance between cells
Examples of connective tissue. Examples of connective tissue.
Examples of portal hypertension vascular distention complications. Examples of portal hypertension vascular distention complications.
Examples of USP labels Source: Courtesy of Novartis Pharmaceuticals Corporation and Mallinckrodt Pha Examples of USP labels Source: Courtesy of Novartis Pharmaceuticals Corporation and Mallinckrodt Pha
Examples of Medical Necessity Criteria Examples of Medical Necessity Criteria
Examples of mimicry. Examples of mimicry.
Video: Semidiscontinuous DNA replication

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