At around 2:30 minutes in to the video Bill Gates says this exact statement...
"The world today has 6.8 billion people. That's heading up to about 9 billion. Now if we do a really great job on new vaccines, health care, reproductive health services, we could lower that number of 9 billion by perhaps 10 or 15 percent"
Think about it. Vaccines don’t kill, injure, or sterilize everyone that is vaccinated, but a certain percent do have serious injuries, become infertile, or die.
The Director of the White House Office of Science and Technology Policy, John P. Holdren co-authored a book called “ECOSCIENCE” in 1977 where he wrote about sterilizing the population by stealth, through the drinking water and through staple foods.
On page 787-788
More Holdren quotes here.
John P Holdren's maybe right on tract with his plan from the late 70's. Genetically Modified Food (GMO's)
particularly GM Corn reduces firtility in mice.
Comprehensive long term studies commissioned by the Austrian government reveal that mice fed GM maize produced fewer and smaller litters with many genes affected compared to controls.