I don't think its possible to know at this point how many people in Gaza have died as a result of the blockade. We do know that many have died because they did not have access to medical care as a result of the blockade. We also know that most of the people in Gaza were subsisting on one meal a day before Israel's latest incursion there. Things are worse there now, not only because of lack of food, but also because of lack of shelter. I think it's going to take some time to determine how many deaths are a result of the blockade and how many are the result of people being bombed to death.

The blockade is unnecessary, and its only purpose is to kill civilians in Gaza.