Source: https://www.weforum.org/agenda/2020/11/fewer-people-say-they-would-take-a-covid-19-vaccine-now-than-3-months-ago
Vaccine hesitancy, the ‘reluctance or refusal to vaccinate despite the availability of vaccines’, was listed among the World Health Organisation’s top ten threats to health in 2019.
In an August 2020 poll around one in four (26%) adults globally disagreed that they would take a vaccine for COVID-19 if it were available, with worry about side effects, followed by perception of effectiveness being mentioned most frequently as reasonsfor not getting a vaccine. This slipped further down in October. The November report from Ispos here. And WEF link here.