The short, short form: In order to get vaccinations you must sign on to TRIPS (or provide similar protections for Big Pharma) which prevent your nation from producing medicines needed to save lives because of patent protections.
Bill Gates is the unscrupulous mind behind Microsoft. Through a system of lies, deceit, and unfair business practices (as found by the US Department of Justice, who later gave him a handslap under the Bush Jr. administration) he parlayed a mediocre BASIC interpreter for the Altair into a multibillion dollar fortune.
One of the things we love to talk about on Slashdot is, of course, Bill Gates. Here's a little something I tossed off in response to a slashdot comment I found particularly repulsive, defending some of the less defendable actions of the Gates foundation. (See Dark Cloud over Good Works of Gates Foundation.) I mirror it here as an essential polemic on evil :p