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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

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Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

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Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Changes in light quality with depth: (a) the rich colours on a shallow coral reef; Changes in light quality with depth: (a) the rich colours on a shallow coral reef;
Myopia (nearsightedness). In the uncorrected top figure, the image comes into focus in front of the Myopia (nearsightedness). In the uncorrected top figure, the image comes into focus in front of the
A photograph of a woman with exophthalmos. This condition is associated with hypersecretion of the t A photograph of a woman with exophthalmos. This condition is associated with hypersecretion of the t
A model of anxiety in which stressful events or a changing mental condition can produce unfavorable A model of anxiety in which stressful events or a changing mental condition can produce unfavorable
Dimensions of quality of life affected by cancer Dimensions of quality of life affected by cancer
National Ambient Air Quality Standards National Ambient Air Quality Standards
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