'''Antivaksin''' adalah tindakan yang menentang pemberian [[vaksin]] baik secara pribadi maupun berkelompok. Gerakan antivaksin sudah muncul semenjak vaksin diciptakan meskipun konsensus ilmiah menunjukkan bahwa vaksin itu aman dan efektif.<ref name=Mag2014>{{cite journal|last1=Maglione|first1=M. A.|last2=Das|first2=L.|last3=Raaen|first3=L.|last4=Smith|first4=A.|last5=Chari|first5=R.|last6=Newberry|first6=S.|last7=Shanman|first7=R.|last8=Perry|first8=T.|last9=Goetz|first9=M. B.|last10=Gidengil|first10=C.|title=Safety of Vaccines Used for Routine Immunization of US Children: A Systematic Review|journal=Pediatrics|date=1 July 2014|doi=10.1542/peds.2014-1079|pmid=25086160|volume=134|issue=2|pages=325–37}}</ref><ref>{{Cite journal |last=Christenson |first=Brith |last2=Lundbergh |first2=Per |last3=Hedlund |first3=Jonas |last4=Örtqvist |first4=Åke |date=2001-03-31 |title=Effects of a large-scale intervention with influenza and 23-valent pneumococcal vaccines in adults aged 65 years or older: a prospective study |url=http://thelancet.com/journals/lancet/article/PIIS0140-6736(00)04237-9/abstract |journal=The Lancet |language=English |volume=357 |issue=9261 |pages=1008–1011 |doi=10.1016/S0140-6736(00)04237-9 }}</ref> Alasan penolakan ini bisa karena menganut teori konspirasi atau pun kepercayaan dalam agama. Sikap antivaksin bisa pula muncul karena menyalahpahami efek samping yang muncul dari vaksin atau salah informasi mengenai kandungan atau proses pembuatan vaksin.
Konsensus ilmiah modern menunjukkan bahwa vaksin itu aman dan efektif.<ref name=Mag2014>{{cite journal|last1=Maglione|first1=M. A.|last2=Das|first2=L.|last3=Raaen|first3=L.|last4=Smith|first4=A.|last5=Chari|first5=R.|last6=Newberry|first6=S.|last7=Shanman|first7=R.|last8=Perry|first8=T.|last9=Goetz|first9=M. B.|last10=Gidengil|first10=C.|title=Safety of Vaccines Used for Routine Immunization of US Children: A Systematic Review|journal=Pediatrics|date=1 July 2014|doi=10.1542/peds.2014-1079|pmid=25086160|volume=134|issue=2|pages=325–37}}</ref><ref>{{Cite journal |last=Christenson |first=Brith |last2=Lundbergh |first2=Per |last3=Hedlund |first3=Jonas |last4=Örtqvist |first4=Åke |date=2001-03-31 |title=Effects of a large-scale intervention with influenza and 23-valent pneumococcal vaccines in adults aged 65 years or older: a prospective study |url=http://thelancet.com/journals/lancet/article/PIIS0140-6736(00)04237-9/abstract |journal=The Lancet |language=English |volume=357 |issue=9261 |pages=1008–1011 |doi=10.1016/S0140-6736(00)04237-9 }}</ref> Akibat tindakan antivaksin, penyakit yang sebenarnya dapat dicegah dengan vaksin dapat merebak dan mengakibatkan kematian.<ref>{{cite web |url=http://www.childrenshospital.org/centers-and-services/division-of-infectious-diseases/faq-resurgence-of-measles |title=Frequently Asked Questions (FAQ) |work=[[Boston Children's Hospital]] |accessdate=February 11, 2014 |archiveurl=https://web.archive.org/web/20131017113035/http://www.childrenshospital.org/centers-and-services/division-of-infectious-diseases/faq-resurgence-of-measles |archivedate=October 17, 2013}}</ref><ref>{{cite journal |last1=Phadke |first1=Varun K. |last2=Bednarczyk |first2=Robert A. |last3=Salmon |first3=Daniel A. |last4=Omer |first4=Saad B. |title=Association Between Vaccine Refusal and Vaccine-Preventable Diseases in the United States |journal=JAMA |date=15 March 2016 |volume=315 |issue=11 |pages=1149–58 |doi=10.1001/jama.2016.1353 |pmid=26978210 |pmc=5007135}}</ref><ref name="wolfesharp">{{cite journal |vauthors=Wolfe R, Sharp L |title=Anti-vaccinationists past and present |journal=BMJ |volume=325 |issue=7361 |pages=430–2 |year=2002 |pmid=12193361 |doi=10.1136/bmj.325.7361.430 |pmc=1123944 }}</ref><ref name=AgeOld>{{cite journal |vauthors=Poland GA, Jacobson RM |title=The Age-Old Struggle against the Antivaccinationists |journal=N Engl J Med |volume=364 |issue=2 |pages=97–9 |date=January 13, 2011 |pmid=21226573 |doi=10.1056/NEJMp1010594 |url=http://www.nejm.org/doi/full/10.1056/NEJMp1010594}}</ref><ref>{{cite news |author=Wallace A |title=An epidemic of fear: how panicked parents skipping shots endangers us all |work=Wired |date=2009-10-19 |url=https://www.wired.com/magazine/2009/10/ff_waronscience/all/1 |accessdate=2009-10-21 }}</ref><ref>{{cite journal |vauthors=Poland G, Jacobson R |title=Understanding those who do not understand: a brief review of the anti-vaccine movement |journal=Vaccine |volume=19 |issue=17–19 |pages=2440–5 |year=2001 |pmid=11257375 |doi=10.1016/S0264-410X(00)00469-2}}</ref>
