knome
Veteran
- Joined
- Feb 25, 2014
- Messages
- 5,604
vaccine
/ˈvaksiːn,ˈvaksɪn/
noun
- a substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, its products, or a synthetic substitute, treated to act as an antigen without inducing the disease.
I'm not convinced that something that only offers partial or a percentage of efficacy fits the definition of the term?
If your immune system is fucked a vaccine probably won't help.
A quick search says smallpox vaccine had 95% efficacy.