Question

The immune response occurring on the first exposure to an antigen is called

• A. secondary response
• B. primary response
• C. passive response
• D. none of the above

Answer 1

The correct option is B primary response

The immune response occurring on the first exposure to an antigen is called primary response. The immune response occurring on second or subsequent exposures to an antigen with stronger response and in a shorter period of time is called secondary response.