"Scientists Invent New Way for Humanity to Destroy Itself"
A few possibilities that come to mind are:
- Using the vaccine against someone someone doesn't like. Arabs, Palestinians, blacks, Hindus, Israelis, White men in golf shirts.
- Adding it other vaccines - only in certain selected areas of course.
- Inadvertent contamination, intentional or not
- genetic modification to include into food, etc.
- release of the carrier virus into the wild using a common vector
- Work begins immediately on an oral form