Communicable diseases can be spread from person to person(the flu, cold) but non-communicable diseases are diseases that can travel from person to person(like diabetes).
The safety chains support the trailer's coupler should it become disconnected with the towing vehicle.
Humoral immunity is immunity from serum antibodies produced by plasma cells. More specifically, someone who has never been exposed to a specific disease can gain humoral immunity through administration of antibodies from someone who has been exposed, and survived the same disease.
Answer: post traumatic health disorder
Explanation: Post Traumatic Health Disorder is a mental health
Condition that is triggered by a shocking,scary or dangerous event
