WASHINGTON (AP) — The government says more than a half million Americans have already taken advantage of the Biden administration’s special health insurance sign-up window that’s keyed to the COVID-19 pandemic. And the government anticipates even more consumers will gain coverage in coming months. That’s because millions of people just became eligible for pumped-up taxpayer subsidies toward their premiums under President Joe Biden’s coronavirus relief legislation. Biden campaigned on a strategy of building on the Obama-era health law to push the United States toward coverage for all. As president, he’s wasted no time. The special sign-up opportunity for Affordable Care Act plans will be available until Aug. 15.