DATE: PERIOD: NAMES: Population Density (Mortality Rate) S N S T QUARANTINE S E A COVID I E D E L N T E A S L E S MORTALITY RATE T I N V O M N PERTUSSIS Q I S N U D I DISEASES I E VIRUS I O S H AREA V Y C S U A M S M E U N A C INFECTION RATE E MEASLES A I S L M I T A CHINA U U U A H E VACCINE DCZH A D 3 M H POPULATION H DrHA E