How Vaccines Prevent Diseases –



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“There are two major kinds of lymphocytes, T cells and B cells, and they do their own jobs in fighting off infection. T cells function either offensively or defensively. The offensive T cells don’t attack the microbe directly, but they use chemical weapons to eliminate the human cells that have already been infected. Because they have been “programmed” by their exposure to the microbe’s antigen, these cytotoxic T cells, also called killer T cells, can “sense” diseased cells that are harboring the microbe. The killer T cells latch onto these cells and release chemicals that destroy the infected cells and the microbes inside.”

MLA Citation:

“How Vaccines Work.”, Department of Health and Human Services, 23 June 2016, Accessed (PUT DATE OF ACCESS HERE).

In-Text: (“How Vaccines Work”)

***REMEMBER all lines of the citation after the first get indented once***

APA Citation:

How vaccines work. (2016, June 23). Department of Health and Human Services. Retrieved from

In-Text: (“How vaccines work,” 2016)

***REMEMBER all lines of the citation after the first get indented once***

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