Vaccination
Which type of vaccine contains weakened pathogens?
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About This Question
- Subject
- biology
- Chapter
- biology and human welfare
- Topic
- vaccination
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Live attenuated
- Live Attenuated Vaccines: These are made from pathogens (viruses or bacteria) that have been weakened in the laboratory so they cannot cause disease in healthy people. However, they can still replicate enough to stimulate a strong, long-lasting immune response (e.g., OPV, MMR, BCG).
- Inactivated (Killed) Vaccines: These use pathogens that have been killed with chemicals, heat, or radiation (e.g., Covaxin, Salk Polio).
- Toxoids: These contain inactivated toxins produced by the pathogen rather than the pathogen itself (e.g., Tetanus, Diphtheria).
- Subunit Vaccines: These use only specific pieces (antigens) of the pathogen (e.g., Hepatitis B vaccine uses the surface antigen).
This easy difficulty biology question is from the chapter biology and human welfare, covering the topic of vaccination. It appeared in the 2025 exam.
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