Florence is dead, but frank flu has found its way into your body through a tiny cut on your hand. which non-specific chemical and biological immune responses could destroy frank flu before he replicates.
Biological barriers are harmless bacteria that use up food and space so pathogenic bacteria cannot colonize the body. If pathogens breach protective barriers, inflammation occurs. This creates a physical barrier against the spread of infection and repairs tissue damage.
Thus, option 2 is correct.
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