This past fall I had a bone infection in my foot. After three rounds of antibiotics and two months later,my foot was still infected. The doctors were discussing putting a pic line in me to insert antibiotics.
At a family gathering I was explaining to my sister-in-law the story of Lourdes. She then brought into the room a flask of holy water that she said her daughter had given her on a trip to Lourdes. I asked her if I could use some of it to pray for a healing for my foot. It was a small amount, so I drove up to the Grotto where I often go to pray and continued to pour water from the Grotto on the area of infection each morning while praying the prayer to Our Lady of Lourdes for healing. A month later, my foot was healed.
I believe it was the water from the Grotto that healed me and my sister-in-law (a non Catholic) was in tears when I told her of my healing.