It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Elongation stage of translation in bacteria
Some viruses that cause human diseases.
The use of bacteria to make human insulin
Bacteria may be named for their morphology (shape): cocci (spherical), bacilli (rod shaped), or ...
Viruses, such as the hepatitis B virus shown here, need a host to survive and multiply