Since the first COVID-19 case was reported, millions of individuals have been infected worldwide, with over a million deaths attributed to the virus. The pandemic has also severely impacted economies worldwide, and countries have long awaited the development of a vaccine to combat the disease. Following several rounds of lockdowns in the U.S. and other countries, multiple vaccine candidates have finally been approved and are being distributed in the U.S. and across the world. As vaccines become more widely available, new questions arise for scientists, public health officials, and government officials, who must coordinate to address vital next steps, including which countries and populations will be prioritized to receive the vaccine first. Which vaccine should people get, and will they be willing? How long can a vaccine guarantee immunity? What will be the cost?