"Through the Defence production Act, the US government has established two prioritizing systems, Defence Priorities and Allocations System Program (DPAS) and Health Resources Priority and Allocations System (HRPAS). The HRPAS has two principal components i.e. priorities and allocations. Under the priority component, certain contracts between the government and private parties or between private parties for the production or delivery of industrial resources required to produce COVID-19 vaccine will be given priority over other contracts to facilitate expedited delivery in promotion of the US, National defence," he said in the letter.