The Marek's Disease Vaccine market is dominated by North America as the largest region, capturing 40% of global demand, driven by advanced poultry infrastructure, stringent biosecurity policies, and high R&D investments. The Asia Pacific region, however, is the fastest-growing, with a 12% CAGR projected through 2030, fueled by expanding commercial poultry operations and government initiatives to combat avian diseases. Europe maintains a 30% market share, supported by EU livestock health regulations and ecosystem maturity, while Latin America and the Middle East & Africa collectively account for 30%, with growth hindered by fragmented infrastructure but accelerated by international partnerships.