Who discovered that eating citrus fruits could cure scurvy?

• Robert Falcon Scott

• James Lind

• Edward Jenner

• Jonas Salk

What is the common name for vitamin C?

• Ascorbic acid

• Citric acid

• Lactic acid

• Folic acid

Why did polar explorers in the late 1800s start seeing scurvy again?

• They stopped eating citrus fruits

• Their lime juice was stored in copper pots

• They were not aware of scurvy

• They ate too much canned meat

What did Robert Falcon Scott's team lack during their South Pole expedition?

• Vitamin C

• Tea

• Biscuits

• Canned meat

Who developed the polio vaccine introduced in 1955?

• James Lind

• Jonas Salk

• Edward Jenner

• Robert Falcon Scott

What is the role of memory cells in the immune system?

• To label germs for cleanup

• To produce antibodies

• To attack germs immediately

• To mount a fast attack if the germ shows up again

What are vaccines made of?

• Strong versions of viruses

• Tiny pieces or weakened versions of viruses or bacteria

• Antibodies

• White blood cells

What was the vaccination rate required to control measles?

• 90%

• 95%

• 80%

• 85%

What is the basic reproduction number (R0) for measles?

• Up to 5

• Up to 18

• Up to 10

• Up to 25

What is the term for the protection provided by a high vaccination rate in a population?

• Community resistance

• Individual immunity

• Population defense

• Herd immunity