Definition: The word "Zostergen" can be a misnomer as it was originally used to refer to Zostera species in the genus Lepidium, but this genus has no known zoster virus. The term is often associated with the development of a vaccine for a disease caused by a specific pathogen called Zostergenella, which is now a bacterium that causes skin blisters on the palms and soles of the feet. Zostergen vaccines are used to prevent outbreaks of Zostergenella infection. The vaccine involves administering a live strain of the bacteria, which can be grown in a lab at very low temperatures and then introduced into human beings through vaccination. The definition of "Zoster Vaccine" is that it is the name of a specific type of vaccine that has been developed to prevent outbreaks of Zostergenella infection. It is usually used to treat or prevent blisters caused by the bacteria, which can cause discomfort and infections in infected individuals.