Some U.S. state lawmakers are fighting a mandate requiring certain vaccinations for children, saying it encourages undesirable behavior. Getting vaccinated has become a more complicated process since the 18th century, when English scientist Edward Jenner first discovered a vaccine for smallpox.
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The most common sexually transmitted virus in the US is genital human papillomavirus (HPV) infection, with 20 million Americans currently infected and another 6.2 million becoming infected each year. Although HPV causes serious damage to women's health, including cervical cancer, awareness of the disease is surprisingly low.
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