Active and Passive Immunity. 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.
Lower back tightness can cause muscle twitching, pain and reduced range of motion. Lower back muscle tightness is the cause of a muscle spasm. This can be brought on by a strain, overuse or muscle weakness, according to BetterMedicine.com.
Causes of Back Muscle Spasms Video. Muscle spasms in the back can be caused by a muscle strain, a sprained muscle, or an underlying condition. Treatment for Back Pain Flare-Ups Video. Learn about treatments for low back pain, including proper methods for controlling inflammation, strength training, medications and more.he first step to getting to the bottom of what your back is telling you and to feeling better is to determine the cause of your back muscle spasm. Muscles spasms occur: 1  As a result of the muscles trying to protect themselves from a muscle strain or sprain or. 2  In response to an underlying condition.