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3099592 3099592
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Suppose that you had a cold last month, and you caught another one this month from your brother. Which of the following explains why you caught a new cold?


Your antigen-presenting cells did not recognize the second cold virus.


The two cold viruses are significantly different.


Memory cells were not formed as a response to the first cold.


The antibodies formed as a response to the first cold were degraded.
Textbook 
Biology: Exploring the Diversity of Life

Biology: Exploring the Diversity of Life


Edition: 4th
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lolalasagnalolalasagna
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Thank you, thank you, thank you!
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You make an excellent tutor!
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