High Five Facts - Immune System

The video explains the immune system's role in protecting the body from harmful antigens and pathogens. It describes two types of immunity: natural and acquired, highlighting the functions of lymphocytes, including B cells and T cells. The video also discusses how the immune system can overreact, causing allergies, and explains the body's response to flu, including fever as a defense mechanism.

What happens when the immune system overreacts to non-harmful antigens?

What is the significance of a fever in relation to the immune system?