MADISON, Wis. (AP) — With more than 40 million doses of coronavirus vaccines available, U.S. health authorities said they’re confident there will be enough for every American who qualifies. A spike in demand is expected after the Centers and Disease Control and Prevention endorsed boosters of the Pfizer vaccine for all Americans 65 and older. The CDC said younger people at higher risk from the coronavirus, because of health conditions or their jobs, would also qualify.