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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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