If you consider that gates was a defense contractor on several occasions at the time where he was working directly with the military and may have more th a juts NGO status , he would be protected from extradition .. and because it’s always a “matter of national security” we will never truly know the whole picture
See my previous post on the meaning of "doing a good job with health care and vaccines" to reduce population growth.
And he neither developed the vaccines nor approved them.