Nature hurts us and "outsmarts" us all the time when it comes to fighting off infectious disease agents. Even if they aren't intelligent, viruses and bacteria do fight with our bodies, using evolved strategies to trick our immune system. Our intelligence will probably never be enough to eradicate many of them. We can't cure the common cold. Nor can we eliminate influenza infections because the virus mutates so rapidly. We don't have a vaccine for AIDS or malaria, which still decimate third-world populations.
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