"We need people to fight back. So many people are depressed, and they've become preoccupied with the negatives of this [Donald Trump] presidency. That can cripple people mentally."

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There is some research that suggests that viruses like the flu are really actually kind of at the razor's edge when it comes to mutation. They're mutating so fast that if they mutated much faster they would actually develop a lot of harmful mutations that could slow them down and cripple them and eventually literally drive them extinct.

— Carl Zimmer