Many athletic organizations and schools are considering limiting the level of aggressive play in younger players, over concerns about head injuries. If you were an athletic director, for a school district in your state or nation, at what age would you allow body checking in hockey or tackling in football?

Some people consider genetic editing unethical. All powerful tools can be used for good or for bad. Do you think it is ethical for scientists and physicians to genetically edit a disease? 

Some countries find it easier than others to run successful vaccination programs (to get the vaccine to all of the ‘target’ children). What factors might make it difficult for a country to run a successful vaccination program?

The article mentions that some doctors are recommending vaping as a way to help patients quit smoking. Do you believe this is the best recommendation?

The liquid nitrogen freezer stores items at -210 degrees Celsius. This type of freezer is used for cryopreservation of cells and tissue. It is also used for certain vaccines that require low-temperature storage for product stability.

Play trivia games related to vaccines, diseases, and the immune system.

Watch this video to see how viruses take over the machinery of human cells.

This video illustrates how hepatitis B virus uses decoys to overwhelm the immune system.