This resource will be valuable if you are interested in the genetics of a particular disease or gene/family of genes. Clinvar (https://www.ncbi.nlm.nih.gov/clinvar/) is a comprehensive list of known genetic variants. These variants are classified as either damaging, benign, or variants of uncertain significance (VUS). This public database is one of the most valuable tools available. By searching for a disease or gene you have the ability to download the full list of variants for your particular interest.
This NIH tutorial website will help you search ClinVar for the information you need.