MAJOR MARKET COMPARISON OF KEY COVID-19 LEGISLATION As pharmaceutical companies worldwide race to supply vaccines and therapeutics to fight the spread of COVID-19, understanding the laws and regulations that could impact parties involved in the COVID-19 pandemic supply chain is increasingly important. This article provides an overview and comparison of legislation relevant to manufacturers, suppliers, distributors, and health professionals involved in the response to the COVID-19 pandemic in each of the United States ("US"), European Union ("EU"), United Kingdom ("UK"), and People's Republic of China ("PRC"), including measures to ensure (1) immunity from COVID-19 countermeasure liability; (2) government ability to direct (or redirect) resources; (3) emergency use authorizations; (4)