Ike nke nkịta, nke Thomas Savage
A akụkọ banyere Thomas Savage mụrụ na 1967 na ugbu a na-abịakwute anyị na na iju virulence nke kasị na-atụghị anya ala ọma jijiji. N'oge gara aga, ọ nwere ike ịdị ka akụkọ ihe mere eme nke United States miri emi, taa a na-achọpụtaghachi ya dị ka akụkọ mmekọrịta siri ike, opekempe site na mmalite, na-abanye n'echiche ahụ nke ihe ...