I would guess all of these are included in the 4.4 million

Yes, and it requires much more than a single nuclear warhead

A single nuclear warhead is not capable of ending life as we know it, where did you read that ?

If you never use medicine that was developed with the help of animal testing I guess you could. If you do use pretty much any kind of antibiotics though, or are unfortunately diabetic and have to use insulin, then it would be pretty hypocritical.