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Trusted Health Information from the National Institutes of Health

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Latest health fast facts

When both parents have sickle cell trait, they have a 25% (1 in 4) chance of having a baby with sickle cell disease with each pregnancy.

Source: Sickle Cell Disease Association of America, Inc.

Hearing loss affects approximately 37.5 million people in the United States ages 18 years or older have some hearing loss. One in three people ages 65 to 74, and nearly half of people ages 75 and older also have hearing loss.

Source: National Institute on Deafness and Other Communication Disorders

DNA illustration

Epigenetics, epəjən'ediks/ (noun): the study of changes in organisms caused by modification of gene expression rather than alteration of the genetic code itself

Source: National Institute of Environmental Health Sciences

Per- and polyfluoroalkyl substances (PFAS) have been used in consumer products around the world since about the 1950s.

Source: National Library of Medicine

NICHD and Waltham researchers partnered together to explore the impact of interactions between animals and their human companions.

Source: National Institute of Child Health and Human Development

About 7.7% of all people diagnosed with migraine have chronic migraine.

Source: The American Migraine Prevalence and Prevention Study

A symptom of colorectal cancer may be no symptoms at all, so discuss preventative screenings with your doctor.

Source: Colon Cancer Coalition

Pulse oximeters as we know them today were invented in the mid-1970s by Takuo Aoyagi, a Japanese electrical engineer. Aoyagi was inspired by the ear oximeters worn by military pilots in World War II to signal when they were at risk of hypoxemia. Pulse oximeters began selling worldwide in the mid-1980s.

Source: National Library of Medicine

90.9%

The five-year survival rate for localized-stage colorectal cancer (the earliest stage) is about 90.9%.

Source: Cancer.gov
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