The main application of Infectia's powers is the creation of Anti-Bodies, grotesquely mutated men who are obedient to her desires. Her slaves have demonstrated powers such as energy blasts, breathing underwater, and size enhancement. Presumably Infectia controls the specific mutation that they manifest.
Infectia's first name was revealed in X-Men (2nd series) #27. In that issue, she used her powers to stave off the Legacy Virus for a brief period, but ultimately succumbed. She was confirmed as resurrected through Krakoa in Dark X-Men (2nd series) #1.