My time is not my own! I’ve learned that the Chemo didn’t work so giving immunotherapy a go. You take Keytruda when the hope is that your immune system will help fight the cancer cells and shrink them or at the very least, keep it from spreading.Every cancer is different. I am not a doctor. Chemo didn’t work in his case….Please see a physician or your oncologist!This is just another step in the transition from being “healthy as a horse” to cancer patient.