There are powers definitely working on it. "Super" just doesn't mean "kills as much people as efficiently as possible". Ability to control the destruction is a crucial feature of any weapon. In the past, this perhaps meant viruses that fizzle out quickly, so they could be deployed on enemy territory. Today, with recent breakthroughs in genetic engineering, that likely means aiming for high selectivity - targeting ethnicity or lineage.
Ultimately, people will be working on it no matter what, because bioweapons are to molecular biology as nuclear weapons are to nuclear physics. A crude and violent application of a field of knowledge of vital, cross-cutting importance to many areas of life.
Ultimately, people will be working on it no matter what, because bioweapons are to molecular biology as nuclear weapons are to nuclear physics. A crude and violent application of a field of knowledge of vital, cross-cutting importance to many areas of life.