How A Virus Invades Your Body

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That was neat. Since most virus escape preliminary defenses
I would have liked it if they had gone into more detail about how your cells have recognize then produce a specific system for eliminating that particular virus and how long it takes.

Flu is -ssRNA, so the "pink molecule" (01:37) also has to come from the virus (it is the RNA-dependent RNA polymerase, and a molecule of that needs to be packed into each new virus particle).