Are the mildew stains on my comforter unhealthy to sleep near?

I made a paste of OxyClean and water, which I applied to the stains and let sit for 24 hours. But the stains are still mostly there. I imagine all the bacteria are dead now though, right? So it's not unhealty to use the comforter. After the OxyClean treatment I washed it in warm water with Arm & Hammer detergent and then dried on very high heat.