Vaccines & Emerging Diseases

Human Preventive & Therapeutic Vaccines

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A preventative vaccine is administered to a person who is free of the targeted infection. By introducing a part of the virus or an inactive virus (which acts like a decoy) into the body, the immune system reacts by producing antibodies. Preventive vaccines are widely used to prevent diseases like polio, chicken pox, measles, mumps, rubella, influenza (flu), and hepatitis A and B.

In addition to preventive vaccines, there are also “therapeutic vaccines”. These are vaccines that are designed to treat people who already have a disease. Some scientists prefer to refer to therapeutic vaccines as “therapeutic immunogens.