What does the body produce in response to a vaccine? A - HSC - SSCE Biology - Question 2 - 2019 - Paper 1

In response to a vaccine, the body primarily produces antibodies. Vaccines work by introducing a harmless component of the pathogen, such as an inactivated virus or a piece of its genetic material. This exposure stimulates the immune system to produce antibodies, which are proteins designed to recognize and neutralize the specific pathogen.

Once the vaccine is administered, the immune system responds by activating B cells, which are responsible for synthesizing antibodies. These antibodies remain in the body long after the initial exposure, providing the individual with immunity against future infections by the actual pathogen.

Thus, the correct answer to the question is option C: Antibodies.