Animation explains how viruses attack our cells to make us sick

Staying healthy is a lot like medieval warfare. Cells vs viruses. There are cells defending their castles and viruses trying to break through. If a sneaky virus manages to attack a cell, the cell fights it and notifies all the other castles about what to build to defend it. Man, learning about biology is so much… » 4/17/14 11:19pm 4/17/14 11:19pm