State of Vaccine Hesitancy in the United States.

Although the term "vaccine hesitancy" has achieved great prominence, the extent to which US parents have reluctance, doubts, or indecision when it comes to vaccines recommended for children and how such hesitancy is manifest are unclear. A narrative review approach that placed emphasis on recent data and published work is used to surface evidence and insights into the current state of US parent vaccine hesitancy. The assessment finds evidence that ∼6% to 25% of parents may be vaccine hesitant, that hesitancy is higher for influenza and HPV vaccines, and there are indications that addressing parent hesitancy has become more challenging.