A study of nearly 2,000 American parents published this month in the journal Pediatrics found that 42% were somewhat or very unlikely to vaccinate their children; compared to 46% of parents who were somewhat or very likely to vaccinate. Twelve percent of parents said they were unsure. The FDA is expected to give emergency use authorization for the Pfizer vaccine for children ages five and older soon, but many parents are still wary of signing their children up when the vaccine becomes available. That has left healthcare workers scrambling to address the most common concerns from parents.