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Different Types of Vaccines
The first human vaccines against viruses were based using weaker or attenuated viruses to generate immunity. The smallpox vaccine used cowpox, a poxvirus that was similar enough to smallpox to protect against it but usually didn’t cause serious illness. Rabies was the first virus attenuated in a lab to create a vaccine for humans.
Vaccines are made using several different processes. They may contain live viruses that have been attenuated (weakened or altered so as not to cause illness); inactivated or killed organisms or viruses; inactivated toxins (for bacterial diseases where toxins generated by the bacteria, and not the bacteria themselves, cause illness); or merely segments of the pathogen (this includes both subunit and conjugate vaccines).
Vaccine type Vaccines of this type on U.S. Recommended Childhood (ages 0-6) Immunization Schedule.
Measles
mumps
rubella (MMR combined vaccine)
Varicella (chickenpox)
Influenza (nasal spray)
Rotavirus
Inactivated/KilledPolio (IPV)
Hepatitis A
Toxoid (inactivated toxin)Diphtheria, tetanus (part of DTaP combined immunization)
Subunit/conjugateHepatitis B
Influenza (injection)
Haemophilus influenza type b (Hib)
Pertussis (part of DTaP combined immunization)
Pneumococcal
Meningococca
Covid-19