Answer the following statement(s) true (T) or false (F)
1. B cells and T cells are two types of antigens involved in humoral immunity.
2. Five elements, including a reservoir host, make up cell-mediated immunity.
3. Direct transmission occurs when the pathogen moves immediately from one host to another and may happen through contact with the infected person or with the discharges of the infected person.
4. A living organism that carries microorganisms from an infected person to another person is known as a vector. The most common carriers are insects such as fleas, flies, mosquitoes, and ticks.
5. Just as the pathogen needs a means of exit from the reservoir host, it also needs a means of entrance into the new host. It can enter a new host through any cavity lined with mucous membrane.
6. Immunity is the condition in which pathogens are absent or controlled.
1. FALSE
2. FALSE
3. TRUE
4. TRUE
5. TRUE
6. FALSE
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