A person highly motivated to preventing diseases.

Whilst humanity as a whole prefers to avoid being sick, a vacctivist understands the dangers of medical ignorance and volunteers to tackle it head-on, often to the irritation of scam artists and egotists.

Can often be found openly engaged in educating the public about the safety of medical technology, both in social situations and on social media.
The new vacctivist at work has really helped reduce work sick days.
by Zenithas October 24, 2018
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A word used by anti-vaxxers to describe people who realize that that vaccines are important, and try to make sure others know this.
They just told me how to give my child a longer life-span, what a vacctivist.
by Crbin October 24, 2018
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Pro-vaccine activists who display religious, fanatical, or cult-like fervor despite evidence of vaccine related injury or death. Vacctivists will usually resort to logical fallacies in their arguments, such as; ad hominem and strawman attacks, guilt by association, and appeal to emotion (fear) to make their case. Vacctivism can be associated with social hypochondria and personal health insecurity which can lead to an obsession about how other people choose to live their lives, on a delayed schedule or vaccine-free.
This vacctivist at work won't stop bugging me about getting a flu-shot!
by Kidyoda February 4, 2015
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Anti-vaccine activists who display religious, fanatical, or cult-like fervor despite the lack of peer reviewed evidence of vaccine related injury or death. Vacctivists will usually resort to logical fallacies in their arguments, such as; ad hominem and strawman attacks, guilt by association, and appeal to emotion (fear) to make their case. Vacctivism can be associated with social hypochondria and personal health insecurity which can lead to an obsession about how other people choose to live their lives. Vacctivists are quoted as preferring children dead from preventable diseases rather than having them vaccinated with proven, tested and reviewed vaccines. They will also gladly risk the health of other children who might be immunocompromised and not able to receive vaccines yet - infecting them with said preventable diseases, sometimes causing them to pass away, or if they recover, injured/handicapped.

Known to project their tactics towards people with more common sense.
The vacctivist posted another praise of Andrew Wakefield online.
by Guardian72 October 24, 2018
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