Hangfire having a serious Mythos flare-up, on October 31 2006. Unfortunately for those around her, PK shields are still working.
This rendered the special bullets to put her down useless!
They did find out, that ingested Colloidal Silver poisoned the infected regions. on a normal human there would be no time for this to work and likely kill the human as well but Hangfire is an exemplar and regen among other things.