"English-speaking countries and territories" . "G7 nations" . "Viral respiratory tract infections" . "G20 nations" . "States and territories established in 1776" . "United States" . "COVID-19" . "Group of Eight nations" . "Former confederations" . "1776 establishments in the United States" . "Member states of the United Nations" . "Countries in North America" . "Federal constitutional republics" . "Superpowers" . "Member states of NATO" . "Occupational safety and health" . "Former British colonies" . "Zoonoses" .