Analysis: Vaccine hesitancy is growing, thanks in part to social media misinformation. Time for the Elvis approach? President-elect Joe Biden's statement that he would be happy to be vaccinated publicly against coronavirus to encourage people to follow suit â€“ following similar pledges from Barack Obama, George W Bush and Bill Clinton â€“ highlights a fundamental concern in global health circles.Vaccine hesitancy â€“ as well as anti-vaccination activism, sometimes promoted by celebrities â€“ is growing. Countries that were once measles-free are seeing new cases due to suspicion over vaccination. Vaccine hesitancy was listed a year ago as one of the World Health Organization's10 global health threats to watch, alongside ebola and the threat of a global influenza pandemic. Coronavirus came instead.