alertness
antibiotic
background
bacteria
bacterial
banner
biology
bird flu
concept
contagious
corona
covid
covid19
dangerous
deadly
design
diagnosis
disease
epidemic
fever
flu
germ
health
human
illness
infect
infection
medicals
medicine
microbe
microbiology
microscopic
outbreak
pandemic
pathology
pneumonia
prevention
respiratory
sars
science
scientific
symptom
unhygienic
vaccine
viral
virology
virus