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There are more nerve cells in one human brain than there are stars in the Milky Way.
Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.
HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
Thyroid conditions may make getting pregnant impossible.
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.