Answer:
Flattery, because it implies that the viewer has the power to stop the flu.
Step-by-step explanation:
This ad uses the media technique of flattery. The ad tries to convince the viewer that he is particularly powerful and important because he has the power to stop the flu. Moreover, he does not encourage him to collaborate with others. He simply states that it is he who holds the possibility of stopping the infection, and in this way it motivates him to act.