Map of the 29 countries that participated in the NO-More-AntibioticS and Resistance (NO-MAS-R) study, a point prevalence study of all infants in the neonatal intensive care unit (NICU) who received at least one antimicrobial agent on July 1, 2019, the birthday of Ignaz Semmelweiss, MD. Participating countries (number of NICUs; total number of infants on antimicrobial therapy) by level of income were: High income, Belgium (n = 1; 3), Canada (n = 2; 5), Chile (n = 4; 38), Finland (n = 1; 10), Greece (n = 1; 5), Israel (n = 2; 14), Italy (n = 13; 77), Japan (n = 3; 12), Netherlands (n = 1; 9), Oman (n = 1; 3), Panama (n = 1; 1), Spain (n = 5; 35), Sweden (n = 1; 4), United States (n = 15; 84); Middle-to-Low Income, Argentina (n = 2; 10), Brazil (n = 1; 13), China (n = 1; 21), Colombia (n = 12; 43), Costa Rica (n = 1; 5), Ecuador (n = 3; 12), Ghana (n = 1; 10), Guyana (n = 1; 9), Haiti (n = 1; 29), Iran (n = 1; 3), Lebanon (n = 1; 2), Mexico (n = 1; 8), Nigeria (n = 3; 43), Peru (n = 2; 14), South Africa (n = 2; 58).