英文關鍵字
2020
air
allergy
bacteria
breath
care
caucasian
china
corona
coronavirus
covid
crowd
disease
epidemic
face
female
flu
health
hospital
human
hygiene
ill
infection
influenza
lady
mask
medical
medicine
outbreak
pandemic
person
pneumonia
pollution
portrait
prevention
protect
public
quarantine
respiratory
safety
sick
vaccine
virus
walking
wearing
woman
wuhan