At lunchtime, Leah shares her water bottle with her friend Dara. If Leah has been exposed to the influenza virus, she may get sick with the flu. She may also pass the virus to Dara. Based on this evidence, which type of disease is the flu?
auto-immune
environmental
infectious
parasitic
Answers: 2
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At lunchtime, Leah shares her water bottle with her friend Dara. If Leah has been exposed to the inf...
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