What is important about Edward Jenner? He helped create a vaccine for smallpox?

Here are the answers to questions 3, 4, and 5:

3. Devon is worried because if the scar indicates that a person has received a vaccine, then his lack of a scar means he has not been vaccinated. This would leave him vulnerable to the disease that the vaccine protects against.

4. The specific text from which to extract the sentence(s) is not provided in the image. Therefore, I cannot quote the exact sentence(s) that helped answer question #3.

5. The correct option is a). Edward Jenner is important because he helped create a vaccine for smallpox, which was a groundbreaking medical achievement.

   $$\boxed{\text{a) He helped create a vaccine for smallpox.}}$$