英文關鍵字
aids
animation
artery
biology
blood
cells
colds
cough
disease
ebola
health
healthy
hepatitis
ill
illness
infectious
measles
medical
medicine
microscope
organs
sick
sneeze
tablets
test
vaccinate
vaccination
vein
video
virus
英文關鍵字
aids
animation
artery
biology
blood
cells
colds
cough
disease
ebola
health
healthy
hepatitis
ill
illness
infectious
measles
medical
medicine
microscope
organs
sick
sneeze
tablets
test
vaccinate
vaccination
vein
video
virus