True.
Also from the Cambridge dictionary:
a substance containing a virus or bacterium in a form that is not harmful, given to a person or animal to prevent them from getting the disease that the virus or bacterium causes:
True.
Also from the Cambridge dictionary: [https://dictionary.cambridge.org/dictionary/english/vaccine](https://dictionary.cambridge.org/dictionary/english/vaccine)
> a substance containing a virus or bacterium in a form that is not harmful, given to a person or animal to prevent them from getting the disease that the virus or bacterium causes:
(post is archived)