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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.
Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.