Immune Response in biochemistry
Immunological memory is due to

short lived helper T cells that signal macrophage to divide
long lived B cells that secrete a specific antibody
short lived macrophage that can recognize specific pathogens
long lived B cells that secrete a specific antigen

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Immune Response in biochemistry
If a person is vaccinated against a disease sometime in the past, which of the following is currently in your body?

A very high level of antibodies against the disease antigens
Memory B lymphocytes for the antigen of this disease organism
All of these
The disease organism itself and antigens for the disease organism

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