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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.
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.