How do we acquire immunity to bacteria and viruses?

The video explains how the immune system acquires immunity to fight pathogens like bacteria and viruses. It details the immune response, highlighting the roles of macrophages, lymphocytes, B-cells, and T-cells. The process of antigen presentation and the production of antibodies by B-cells are discussed, emphasizing the body's ability to develop long-term immunity after infection or vaccination.

What triggers an immune response when a virus attacks the body?

How do memory B-cells contribute to long-term immunity?

What is the time frame for the body to acquire full immunity after an infection or vaccination?