Naturally acquired active immunity occurs when the person is exposed to a live pathogen, develops the disease, and becomes immune as a result of the primary immune response. Artificially acquired active immunity can be induced by a vaccine, a substance that contains the antigen.
The main cause of neck pain is tension. During periods of intense anxiety, your muscles tense up dramatically. Muscle tension tightens the muscles, especially in the shoulders, back, and neck. The more anxiety you experience, the more your tension may cause significant pain and discomfort. A related issue comes from the mindset of those with anxiety. Many people get muscle tension in their neck during times of stress.
Certain medical problems can cause neck pain. These include: 1  Problems related to aging, such as: 2  Narrowing of the spinal canal (cervical spinal stenosis). 3  Arthritis of the neck (cervical spondylosis). 4  Illnesses such as: 5  Meningitis, which causes inflammation around the tissues of the brain and spinal cord.ctivities that cause neck pain. Most neck pain is caused by activities that involve repeated or prolonged movements of the neck. This can result in a strain (an overstretched or overused muscle), a sprain (injury to a ligament), or a spasm of the neck muscles. These activities include: