What is "infectia"

Infectia (Josephine) is a fictional character appearing in American comic books published by Marvel Comics. She first appeared in X-Factor #28, published May 1988, and was created by Louise and Walt Simonson. Infectia is skilled geneticist with the mutant power to induce mutations in living things. She accidentally causes The Beast to regain his blue furry look and restores his intelligence. She was one of many mutants that died from the Legacy Virus.