Not an expert but it seems acid is not specific enough. There are acidic organs like the stomach but also the vagina. I wonder if the nano robots would then att

Not an expert but it seems acid is not specific enough. There are acidic organs like the stomach but also the vagina. I wonder if the nano robots would then attack stomach and vagina cells. This said, I am pleasantly surprised that nano robots, a scifi idea, are actively researched and tested. As a child I watched a French TV scifi animation series which showed people and their vessel minified and injected into a human body. Now finally it seems this future has started? I hope it is a good start.