英文關鍵字
3d
vaccine
virus
medical
omicron
epidemic
coronavirus
pandemic
background
illness
covid19
disease
fever
flu
health
biology
science
virology
infection
corona
influenza
microbiology
variant
mutation
risk
medicine
syndrome
illustration
concept
microbe
research
nature
sarscov2
macro
virion
sars
contagious
pathogen
infectious
abstract
respiratory
infect
antibiotics
viruses
microscopic
symptoms
novel
sickness