"We are not pro- or anti- the vaccine. This is not a pro- or anti- vaccine matter,” the group stated. “It is a question of whether our employers on behalf of the government can authorise civil conscription and interfere with the relationship between a patient and their doctor by mandating a vaccine.” Definition of anti-vaxxer : a person who opposes the use of vaccines or regulations mandating vaccination. Mirriam-Websters dictionary.