So-called vaccine hesitancy often but not always based on misinformation has emerged as a barrier in the effort to reach the “herd immunity” needed to extinguish COVID-19 as a serious health threat.<br/><br/>
So-called vaccine hesitancy often but not always based on misinformation has emerged as a barrier in the effort to reach the “herd immunity” needed to extinguish COVID-19 as a serious health threat.