Critical Thinking Extension: Here are some ideas for discussion in class after the lesson. 

• Do you think that it’s OK for parents to decide whether or not to vaccinate their children with the MMR vaccine? Does your answer change depending on the type of vaccine (e.g., what about the flu shot or the vaccine against tetanus)? 
• What are some valid exceptions to the vaccine mandate? What are some poor reasons to avoid the vaccine schedule? 
• Do you think it’s OK to use animals in biomedical research? Does it matter what species we are talking about? What might an alternative research method be? Does the benefit justify the cost?