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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.
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There are approximately 3 million unintended pregnancies in the United States each year.