1. Which line of defense is “unique” toward a specific antigen? 2. What does it mean when we say that we are “immune” to a certain disease? 3. How do vaccines “fool” our immune systems? Which line of...

1. Which line of defense is “unique” toward a specific antigen?

2. What does it mean when we say that we are “immune” to a certain disease?

3. How do vaccines “fool” our immune systems? Which line of defense do they target?

4. What antigens are present on the blood cells of an individual with a blood type of AB positive?