Is Acquired Brain Injury (ABI) contagious?

Acquired Brain Injury (ABI) is absolutely not contagious and cannot be spread from person to person through any form of contact, including touch, proximity, or sharing living spaces. An Acquired Brain Injury is a non-progressive condition resulting from external trauma or internal physiological events, meaning it poses no risk of infection to family members, caregivers, or friends.

What causes Acquired Brain Injury?

Unlike infectious diseases, an Acquired Brain Injury is caused by damage to the brain that occurs after birth. This damage is typically categorized into two types: traumatic and non-traumatic. Traumatic causes include physical force, such as a fall, motor vehicle accident, or blow to the head. Non-traumatic causes, often referred to as internal injuries, include strokes, hypoxia (lack of oxygen), tumors, or infections like meningitis that cause subsequent damage to brain tissue. Because Acquired Brain Injury is a physical or physiological event, it has no biological mechanism for transmission.

Why is there confusion about contagion?

The misconception that Acquired Brain Injury is contagious often stems from a lack of public awareness regarding the difference between brain damage caused by injury and symptoms caused by infectious diseases. Because some forms of Acquired Brain Injury can be triggered by an initial infection—such as encephalitis or meningitis—observers may mistakenly link the resulting neurological deficits to the infectious agent rather than the secondary injury to the brain. It is important to clarify that once the acute infection is treated, the resulting Acquired Brain Injury itself is a permanent neurological state, not a communicable illness.

Are there environmental triggers for ABI?

While Acquired Brain Injury is not contagious, certain environmental factors can increase the risk of an injury occurring. Common risk factors include:

• High-impact physical activities without proper safety equipment.


• Environmental hazards that lead to falls, particularly in older adults.


• Exposure to toxins or substances that can cause internal brain damage.


• Medical conditions like untreated hypertension which increase the risk of stroke.

Next steps

• Consult with a neurologist or physiatrist to understand the specific origin of the Acquired Brain Injury.


• Connect with the 15 members of our community at DiseaseMaps.org to share experiences and combat social stigma.


• Utilize resources from the Brain Injury Association of America to educate family members and friends.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH National Institute of Neurological Disorders and Stroke (NINDS)


• Brain Injury Association of America (BIAA)


• Centers for Disease Control and Prevention (CDC) - Traumatic Brain Injury & Concussion


• World Health Organization (WHO) - Neurological Disorders