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.
The most common causes of muscle stiffness or tightness are parkinson disease, sprain or strain, and carpal tunnel syndrome. Other possible causes, such as spinal stenosis, are more rare.ithin all the people who go to their doctor with muscle stiffness or tightness, 47% report having ache all over, 47% report having neck pain, and 47% report having back pain. 1  Back pain 47. 2  Neck pain 47. 3  Ache all over 47. 4  Muscle pain strong predictor 37. 5  Joint swelling strong predictor 37. 6  Arm pain 37. 7  Headache 37.