Test 2

What is the primary role of vaccines?

• To cause allergic reactions

• To destroy the immune system

• To make people sick

• To create memory cells and provide immunity

How do live vaccines differ from other types of vaccines?

• They are less effective

• They use dead germs

• They use weak but live germs

• They don't create memory cells

Why do some vaccines need to be updated regularly, like the flu vaccine?

• Because they expire quickly

• Because the virus mutates often

• Because they are not effective

• Because they are too strong

What is a common side effect of measles in children?

• Better vision

• Improved memory

• Increased strength

• High fever and rash

What happens to children who survive measles?

• They have a damaged immune system

• They become immune to all diseases

• They become stronger

• They never get sick again