Americans as young 12 could get the Covid-19 vaccine this week. Some experts think it could turn the pandemic around Pediatricians and pharmacies across the US are ready to administer Covid-19 vaccines for 12- to 15-year-olds, a development the US Food and Drug Administration predicts could begin in some places Tuesday — and may begin more broadly Thursday. In what President Joe Biden called a “promising development,” the FDA expanded the emergency use authorization (EUA) Monday for the Pfizer vaccine to be given to adolescents as young as 12. The agency also set a meeting for next month for vaccine advisors to discuss authorizing vaccines for younger children.