These include instances of derepression and/or retrotransposition of L1 elements associated with Parkinson’s disease [114], schizophrenia [115], Alzheimer’s disease (AD) [116], both L1 and HERV-K with amyotrophic lateral sclerosis (ALS) [117,118,119], and HERV-W with multiple sclerosis (MS) [120]. This evidence concerns the gene ERVW-1 and amyotrophic lateral sclerosis.