As Pfizer and BioNTech announced on Monday that their COVID vaccine had a “robust” response in children aged 5 to 11, the nation’s leading infectious disease expert assessed that the shot would likely be made available for young kids before Halloween. Pfizer’s and BioNTech’s COVID vaccine for children provides two 10 mg doses of the shot 21 days apart in what the companies said produced a strong antibody response during test trials with similar side effects seen in those aged 16 to 25. Former Food and Drug Administration Commissioner Dr. Mark McClellan agreed with Fauci’s assessment, also saying kids realistically could be getting vaccinated in a month based on the new data released by Pfizer on Monday.