Name an infectious disease and explain how ONE host response is a defence adaptation. - HSC - SSCE Biology - Question 24 - 2016 - Paper 1

When a person is infected with chickenpox, the host's immune system triggers a response, primarily involving the activation of specific B and T lymphocytes. B cells produce antibodies that bind to the varicella-zoster virus, neutralizing it, while T cells identify and destroy infected cells. This immune response is a defence adaptation because it not only helps in clearing the infection but also establishes immunological memory, enabling the host to respond more effectively to future exposures to the virus.