A C.D.C. examine means that 42 % of youngsters aged 5 to 11 have coronavirus antibodies from prior an infection, prompting some F.D.A. advisers to ask if one dose could be adequate for youngsters. Use of that examine has been questioned by some scientists. F.D.A. panelists additionally requested whether or not solely these with high-risk medical situations, comparable to weight problems, ought to get the vaccine, since it’s clear they’re most susceptible to getting very unwell with Covid-19.

However C.D.C. officers mentioned it will be exhausting to slim eligibility, and the F.D.A.’s advisory panel endorsed providing the pediatric dose to the whole age group by a 17-0 vote, with one abstention.

Dr. Marks, the F.D.A. regulator, mentioned on Friday that information on vaccinating youngsters youthful than 5, which Pfizer and Moderna are at present finding out, have been a “few extra months off.”

“The benefit-risk will get to be much more of a cautious consideration, as a result of the youngest youngsters are affected the least immediately when it comes to extreme Covid-19,” he mentioned.

Dr. Snowden mentioned the Delta variant worn out any notion that youngsters are impervious to the virus. On the peak of the newest surge, she mentioned, the Arkansas Youngsters’s Hospital was treating as many as 30 youngsters a day for Covid, together with some with totally vaccinated mother and father. Whereas that quantity has shrunk, “it’s nonetheless not again to the place we have been earlier than Delta,” she mentioned.

A lot of the burden of the rollout of youngsters’s photographs is anticipated to fall on pediatricians and household physicians, lots of whom are strained by staffing shortages and pent-up demand for care at this level within the pandemic however have deep relationships with mother and father and youngsters. Dr. Sterling Ransone, the president of the American Academy of Household Physicians and a doctor in rural Deltaville, Va., mentioned that he would maintain his workplace open afterward weekdays and on Saturdays to accommodate demand for pediatric photographs.

“We all know who to prioritize — asthmatics, these with coronary heart illness, people who find themselves overweight,” he mentioned.

Dr. Victor Peralta, a pediatrician within the racially various neighborhood of Jackson Heights, Queens, mentioned uptake is likely to be a bit slower at first amongst his sufferers, most of whom are poor sufficient to have Medicaid protection. However he predicted the pediatric dose would catch on and in the end assist sluggish transmission of the virus. “I’ve little doubt that this can make a distinction past simply the apprehensive properly,” he mentioned.