1. Which part of the immune system is responsible for a fast, non-specific defense?
2. What is the primary role of vaccines in relation to the immune system?
3. Why are boosters and annual vaccines often necessary?
4. What does 'herd immunity' describe?
5. Which type of cells are primarily responsible for producing antibodies?
6. What do common vaccine side effects like a sore arm, fever, or fatigue indicate?
7. Which vaccine type uses a weakened version of the pathogen?