The Food and Drug Administration said Tuesday it will consider authorizing Pfizer’s COVID-19 vaccine for kids as young as 6 months, opening the door to immunizing some 23 million American children for whom vaccines haven’t yet been available. For many parents of young tots, that approval can’t come quick enough. They worry their kids will pick up the virus at day care and bring it home to the whole family, including grandma and grandpa. Others with reservations about the shots view the development with a sense of dread, fearing new mandates, and some health experts question the benefit of vacc…