"Whooping cough" . "RTT" . "Vaccine-preventable diseases" . "States and territories disestablished in 1948" . "Pediatrics" . "Divided regions" . "Northeast Asia" . "Bacterial diseases" . "Korea" . "Disputed territories in Asia" . "Disorders causing seizures" . "RTTEM" . "East Asia" . "Korean-speaking countries and territories" . "Former countries in Asia" .