Vaccines contain viruses, bacteria or other disease-causing organisms that have been killed or altered so that they can no longer cause disease.
(Vaccines; contain; viruses, bacteria or other disease-causing organisms that have been killed or altered) (viruses, bacteria or other disease-causing organisms; have been killed; ) (viruses, bacteria or other disease-causing organisms; altered; so that they can no longer cause disease) (they; can no longer cause; disease)
Vaccines viruses, bacteria or other disease-causing organisms viruses, bacteria or other disease-causing organisms they
contain have been killed altered can no longer cause
viruses, bacteria or other disease-causing organisms that have been killed or altered
so that they can no longer cause disease
disease