Image: Smallpox vaccine
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Description: 1a. Cowpox virus is injected into the bloodstream. 2a. The virus enters the cells and a mild fever develops. 3a. T-cells and B-cells recognize the antigen as a threat. 4a. Activated T and B cells replicate, and their offspring become memory T-cells and B-cells. 5a. Antibodies are produced and destroy the virus. 1b. Smallpox virus is injected into the bloodstream. 2b. Memory T and B cells recognize the virus. 3b. Antibodies are produced and destroy the virus.
Title: Smallpox vaccine
Credit: Own work
Author: Gnomstah
Usage Terms: Creative Commons Attribution-Share Alike 4.0
License: CC BY-SA 4.0
License Link: https://creativecommons.org/licenses/by-sa/4.0
Attribution Required?: Yes
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