Vaccine hesitancy is a delay in acceptance, or refusal, of vaccines despite the availability of vaccine services and supporting evidence. The term covers...

Claims of a link between the MMR vaccine and autism have been extensively investigated and found to be false. The link was first suggested in the early...

Dengue vaccine is a vaccine used to prevent dengue fever in humans. Development of dengue vaccines began in the 1920s, but was hindered by the need to...

papillomavirus (HPV) vaccines are vaccines that prevent infection by certain types of human papillomavirus (HPV). Available HPV vaccines protect against either...

the 1970s and 1980s, a controversy erupted related to the question of whether the whole-cell pertussis component of the DPT vaccine caused permanent brain...

Oxford–AstraZeneca COVID‑19 vaccine, sold under the brand names Covishield and Vaxzevria among others, is a viral vector vaccine for the prevention of COVID-19...

The Dengvaxia controversy (locally [dɛŋˈvakʃa]) occurred in the Philippines when the dengue vaccine Dengvaxia was found to increase the risk of disease...

The oral polio vaccine (OPV) AIDS hypothesis is a now-discredited hypothesis that the AIDS pandemic originated from live polio vaccines prepared in chimpanzee...

The smallpox vaccine is the first vaccine to have been developed against a contagious disease. In 1796, British physician Edward Jenner demonstrated that...

Vaccine contamination with Simian vacuolating virus 40, known as SV40 occurred in the United States and other countries between 1955 and 1961. SV40 is...