The American Heart Association (AHA) is a nonprofit organization in the United States that funds cardiovascular medical research, educates consumers on healthy living and fosters appropriate cardiac care in an effort to reduce disability and deaths caused by cardiovascular disease and stroke.

The American Psychological Association (APA) is the main professional organization of psychologists in the United States, and the largest psychological association in the world.

Automotive safety is the study and practice of automotive design, construction, equipment and regulation to minimize the occurrence and consequences of traffic collisions involving motor vehicles.

The Centers for Disease Control and Prevention (CDC) is a national public health agency in the United States.

A child safety seat, sometimes called an infant safety seat, child restraint system, child seat, baby seat, car seat, or a booster seat, is a seat designed specifically to protect children from injury or death during vehicle collisions.

Circadian rhythm is a natural, internal process that regulates the sleep-wake cycle in living organisms.

The Wikipedia page on "COVID-19 pandemic in the United States" provides a comprehensive overview of key information related to the outbreak of the COVID-19 virus in the United States.

The National Heart, Lung, and Blood Institute (NHLBI) is the third largest Institute of the National Institutes of Health, located in Bethesda, Maryland, United States.