The U.S. can expect increased Covid-19 testing, a national mask policy and the possibility of nationwide lockdowns once President-elect Joe Biden takes office Jan. 20. The Biden-Harris campaign laid out a step-by-step plan for addressing the coronavirus pandemic that includes more testing, increasing use of the Defense Production Act to make protective equipment for frontline workers and restoring the U.S. relationship with the World Health Organization. On top of that, Biden says he would establish a U.S. public health jobs corps to "mobilize at least 100,000 Americans across the country" to support contact tracing efforts. Biden has called for national mask requirements, though experts say it's unclear how that would be executed. In an Oct. 23 speech, Biden said he would " go to every governor and urge them to mandate mask wearing in their states." And if that doesn't work, Biden said he would turn to mayors and county executives to institute local mandates. Masks would be required in all federal buildings and interstate transportation systems. Biden would also direct the CDC to provide communities with evidence-based guidance on when to close some business or schools depending on the degree of viral spread. The CDC would be empowered to guide states when to place appropriate restrictions on gathering sizes and when to issue stay-at-home orders.