Reopen America Act of 2020 This bill provides appropriations to support efforts to resume social and economic activity impacted by COVID-19 (i.e., coronavirus disease 2019) and otherwise requires actions to support those efforts. For example, the bill provides appropriations for the Department of Health and Human Services (HHS) to review state reopening plans and reimburse states for related expenses. States may submit plans that maximize economic and social activity while meeting certain public health goals, such as sufficient capacity in the health care system to treat patients without resorting to crisis standards of care. HHS must (1) approve plans, in consultation with the Treasury Department, that meet specified criteria; and (2) reimburse states for certain expenses related to implementing approved plans. HHS shall provide guidance on certain public health safeguards to assist states with developing reopening plans, and states shall provide HHS with information to evaluate implementation efforts. The federal government must ensure an adequate national supply of testing, protective gear, and other supplies to assist states with reopening plans. Additionally, the bill provides appropriations for the Biomedical Advanced Research and Development Authority to carry out a program to evaluate various issues with respect to COVID-19 testing, in coordination with the Centers for Disease Control and Prevention. The bill also establishes in the Defense Logistics Agency (1) the Coronavirus Health Equipment Production Board, and (2) the Coronavirus Reopening Advisory Panel. The board has certain responsibilities over procuring and distributing supplies and may, if necessary, use certain authorities granted to the President under the Defense Production Act of 1950. The panel must advise HHS and the agency concerning reopening plans and must regularly provide a public summary of such advice.