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Author Question: A university must choose a team of 6 students to participate in a TV quiz show. The students will be ... (Read 1247 times) |
People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
People about to have surgery must tell their health care providers about all supplements they take.
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.