Concept
Vaccine types
Live, inactivated, subunit, toxoid, mRNA, vector
High-yield clue
Live-attenuated vaccines give strong, durable immunity but replicate, while inactivated/subunit vaccines are safer and often need boosters.
Overview
The major platforms used to induce protective adaptive immunity, including live-attenuated, inactivated (killed), subunit/conjugate/toxoid, mRNA, and viral-vector vaccines. Each platform trades off immune strength against stability and safety framing.
Classification
- Immunology concept
- Multiple antigen-delivery platforms
- Active immunization strategy
Lab & identification clues
- Toxoid vaccines use inactivated exotoxin (tetanus, diphtheria)
- Conjugate vaccines link capsular polysaccharide to a carrier protein
- mRNA and viral-vector platforms deliver antigen-coding genetic material
Associations
- Conjugate vaccines improve infant response to encapsulated organisms
- Live vaccines generally avoided in immunocompromised hosts (vocabulary)
- Herd immunity depends on vaccine coverage
Commonly confused with
- Active vs passive immunization
- Live-attenuated vs inactivated
Your notes
Original microbiology concept summary. Sources checked: OpenStax Microbiology 2e, NCBI Bookshelf Medical Microbiology, and CDC/WHO topic pages where applicable; reviewed 2026-06. Educational only; no diagnosis, treatment selection, infection-control instructions, or specimen-handling guidance.