• a liver is transplanted from a donor to a recipient - adaptive immune response (via T killer cells or B cells)
• a person is injected with the typhoid vaccine-adaptive immune response (The immune response to vaccination may not be perceived as illness but still confers immune memory)
• swelling occurs around the area of a scratch-innate immune response (inflammation)
• a person has a high fever during a viral infection-innate immune response(includes substances called interferon and interleukin-1 which causes fever).