Moderna's COVID-19 vaccine is entering clinical trials at Yale School of Medicine for patients ages 6 months to 12 years old.

Lead investigator Dr. Inci Yildirim says the trial will start with its oldest participants and lowest doses and expand slowly from there.

Approval of the vaccine in small children probably isn't coming until later this year at least, but local pediatricians say parents are already asking when their children can get their shots.

Dr. Amit Kamath, of Trumbull Pediatrics, says when parents do have vaccinations concerns, he's quick to put their minds at ease.

Researchers say 20% of the population is children, so getting them vaccinated is essential for herd immunity.