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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.
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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.