https://www.sciencedaily.com/releases/2020/10/201020131340.htm > To date, more than 90 COVID-19 vaccines are in development, half of which are in human trials. In addition to addressing the formidable challenges of developing a safe and effective vaccine, producing it on a large scale, and distributing it equitably, health authorities worldwide must now consider the added obstacle of vaccine hesitancy. > "We found that the problem of vaccine hesitancy is strongly related with a lack of trust in government. Vaccine confidence was invariably higher in countries where trust was higher," said Jeffrey V. Lazarus, ISGlobal researcher and study coordinator.