Battling Viruses: The Body's Defense and Vaccine Power

The video explains how viruses attack cells and how the immune system responds. It covers symptoms like fever, cough, and tiredness, and discusses how viruses spread through air and surfaces. The importance of hygiene and masks is highlighted. The video also explains virus mutations and the development of vaccines, using polio and smallpox as examples. It concludes with a review and quiz questions.

What new insight or understanding did you gain from this video?