I suspect the world would be better off if all knowledge of nuclear weapons were eradicated. I doubt on a few levels that the damage can really be isolated given proliferation. Baby Boomers were found to have significantly elevated levels of strontium-90 in their baby teeth attributed just to atmospheric testing. That did result in a treaty to ban the practice, but nuclear weapon research continued and continues today. I doubt any country will willingly stop viral research; especially because there are legitimate medical reasons for such research, though I suspect weapon applications are inextricably intertwined as well.