However, investigational vaccines are still in the testing and evaluation phase and are not licensed for use in the general public. Passive immunity Immunity produced in an animal or person and transferred to another person, usually by injection. It is effective but usually disappears in a few weeks to months. An undesirable effect of a vaccine. Systemic Affecting the whole body.
Some toxins can cause diseases, such as botulism and tetanus.
Toxoid A vaccine prepared from an inactivated bacterial toxin. A tiny organism that multiplies within cells and can cause disease. Measles, mumps, chickenpox, and hepatitis are diseases caused by viruses.