Repeating yourself over and over doesn't make you any less wrong, as other people have said a Siva infection is on a cellular level and would obviously infect more then her armor. Regardless of why anyone THINKS it's already said I'm the grimoire and I'm pretty sure even in the story itself that she was infected.
The campaign and ARG stated that it affected just armor and weapons which is also why cayde wanted to be infected with the yellow strain. Its either retconned immediatly before launch to be stated in the grimiore on a cellular level or it acts differently because of plot reasons.
There was nothing on her face. It was that crap flying around that saladin was destroying and it was starting to fly around her by the time the door closed.