The White House said Wednesday that the COVID-19 vaccine regime for kids younger than 4 years old will likely be three doses when it’s approved — and vowed to make millions more hard-to-find Pfizer anti-viral pills available in coming months.Two clinical trials of the Pfizer vaccine on children ages 6 months to 2 years old, and ages 2 to 4 are underway, but the older group hasn’t yet met standards, White House chief medical adviser Dr. Anthony Fauci said at a press conference.“Dose and regimen for children 6 months to 24 months worked well, but it turned out the other...