and make chemical adjustments; and to perform other related duties as required. E ssential Duties and Responsibil ities The duties and responsibilities listed below are intended to provide a representative list of the various types of work that may be performed. Specifications are not intended to reflect all duties performed within the job class, and incumbents may expect to perform other related similar duties.
A vaccine is a biological preparation that provides active acquired immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing micro-organism and is often made from weakened or killed forms of the microbe, its toxins or one of its surface proteins.
The inactivated polio, hepatitis A, influenza (shot) , and rabies vaccines are made this way. Because the virus is still seen by the body, cells of the immune system that protect against disease are generated. There are two benefits to this approach:1  The vaccine cannot cause even a mild form of the disease that it prevents. 2  The vaccine can be given to people with weakened immune systems.se part of the virus. Using this strategy, just one part of the virus is removed and used as a vaccine. The hepatitis B and the human papillomavirus (HPV) vaccines are made this way.