NPR Video: How a Flu Virus Invades Your Body

NPR Video: How a Flu Virus Invades Your Body: "It starts very simply. A virus, just one, latches on to one of your cells and fools that cell into making lots more. Lots, lots more, like a million new viruses. This animation shows you how viruses trick healthy cells to join the dark side".

References:
Flu Attack! How A Virus Invades Your Body. NPR.