Millions of people are pinning hopes for a return to normal on a COVID-19 vaccine as cases and deaths continue to mount in Georgia and the U.S., but public health officials have work to do to make sure communities hit hardest by the virus have access to treatment.

A vaccine will only work if a lot of people can get immunized. State health officials are working furiously to design outreach and distribution plans, with little clarity from the federal government.

A CDC advisory committee is debating this issue Tuesday. Half of U.S. adults could be considered high priority, yet the initial supply is likely to be only enough for 3% to 5% of the population.