英文關鍵字
alert
bacterium
biohazard
biology
blood
china
contagious
corona
coronavirus
covid
death
diagnosis
diagnostic
disease
doctor
epidemic
fever
fight
flag
ghana
global
hazard
health
hospital
illness
immunity
infection
infectious
map
medical
medicine
microbiology
pandemic
panic
pathogen
people
pneumonia
prevention
research
respiratory
risk
science
spread
symbol
vaccine
virus
waved
waving