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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.
According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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.

