Vaccines that use a weakened or attenuated version of the bacteria or viruses that cause a disease are known as attenuated live vaccines.
Vaccines that use a weakened or attenuated version of the bacteria or viruses that cause a disease are known as attenuated live vaccines. Given in relatively modest doses, viruses or bacteria proliferate in the recipient of the vaccination and trigger an immunological response. They elicit a powerful and enduring immune response, but their effectiveness is limited by the risk that a virus will revert to a disease-causing form. A subunit vaccination would be one that solely included the virus envelope protein in order to prevent a specific viral illness. A subunit vaccination will only contain particular components obtained from disease-causing bacteria, parasites, or viruses, as opposed to a whole-pathogen vaccine.
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