There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Green tea is able to stop the scent of garlic or onion from causing bad breath.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
Selected Drugs Suspected of Causing Cancer in Humans
Chest x-ray of lung cancer; cancer is seen on the left side.
Dental Related Adverse Effects in Patients Undergoing Cancer Treatment
The timing of teratogen exposure
(left) Urine sample from an unaffected person does not change color upon exposure to air. (right) Ur