"Vaccine-preventable diseases" . "Metropolitan areas of China" . "States and territories established in 1997" . "1842 establishments in Asia" . "Port cities and towns in China" . "Populated coastal places in Hong Kong" . "Hong Kong" . "Animal viral diseases" . "Populated places established in 1842" . "South China Sea" . "RTTEM" . "Healthcare-associated infections" . "RTT" . "English-speaking countries and territories" . "Pearl River Delta" . "Influenza" . "Special administrative regions of China" . "Chinese-speaking countries and territories" .