We share more than food and culture within our homes and communities. We can also spread disease. Luckily, we live in a time when vaccines can protect us from many of the most serious illnesses.

A concussion is a type of traumatic brain injury—or TBI—caused by a bump, blow, or jolt to the head or by a hit to the body that causes the head and brain to move rapidly back and forth.

The National Institute of Environmental Health Sciences (NIEHS) is one of the lead research agencies studying the environmental causes of Parkinson’s disease, a neurodegenerative disease thought to be caused by the interaction of genes and environment.

Every year, tens of thousands of Americans get sick from diseases that could be prevented by vaccines – some people are hospitalized, some even die. Immunization is our best protection against these diseases.

Insomnia is one of the most commonly reported sleep problems. One in four women has some insomnia symptoms, such as trouble falling asleep, trouble staying asleep, or both. About one in seven adults has chronic (long-term) insomnia.