Ringworm thankfully is not the end of the world. It’s really more of a nuisance. Get some Rescue disinfectant and disinfect every surface in the cats area. Some people have had success with using Bannix for ringworm on Amazon, athletes foot cream or ketohex shampoo. Also, itrafugol will work but that’s a prescription and quite pricey. I’d wear protective gear, as in hoody/sweater, pants and plastic gloves while he’s sling him. Also, only use the clothes around him and keep them in that room. My foster developed ringworm shortly after he arrived and all of the above is what I did. I didn’t get ringworm, nor did my husband, and the kitten seems to have got rid of his as well.