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. With the number of uninsured Americans rising during the pandemic, Biden reopened the law’s heath insurance markets as a backstop. Then, the virus aid package essentially delivered a health insurance price cut by making taxpayer subsidies more generous, while also allowing more people to qualify for financial assistance.