This higher tier covers Types of Vaccines — Extension Content within Vaccination and Herd Immunity for GCSE Biology. How vaccines work, types of vaccines, population immunity, vaccination programs It is section 4 of 15 in this topic. This section is most useful once the core foundation idea is secure, because it adds the detail that pushes answers higher.
🎓 Types of Vaccines — Extension Content
Beyond GCSEThe AQA GCSE specification only requires you to know that vaccines contain dead or inactive pathogens that trigger an immune response. The table below goes beyond the specification and is provided for enrichment only — you will not be asked to distinguish between these vaccine types in GCSE exams.
| Vaccine Type | Components | Advantages | Disadvantages | Examples |
|---|---|---|---|---|
| Live Attenuated | Weakened living pathogens | Strong, long-lasting immunity | Risk for immunocompromised individuals | MMR, BCG, oral polio |
| Inactivated (Killed) | Dead pathogens or components | Safe for immunocompromised | May need booster shots | Flu, hepatitis A, rabies |
| Subunit/Component | Specific pathogen proteins | Very safe, targeted | May require adjuvants | Hepatitis B, HPV |
| Toxoid | Inactivated bacterial toxins | Targets toxin-mediated diseases | Requires booster shots | Tetanus, diphtheria |
Practice questions for Vaccination and Herd Immunity
What do vaccines contain?
Explain how vaccination protects a person from getting a disease. [3 marks]