Can you link to such a trial? I only know of gm modified new insects, to take over and die (they reproduce a lot, but their offspring dies, so other normal repr

Can you link to such a trial? I only know of gm modified new insects, to take over and die (they reproduce a lot, but their offspring dies, so other normal reproduce less). But of a manufactored virus or bacteria I have not heard yet. And I think it would be way more dangerous.