ERVW-1 and amyotrophic lateral sclerosis: The analysis of retroviral expression on lymphomonocytes showed that HERV-K env protein was expressed with greater frequency in patients’ B cells (ALS compared to HCs, mean ± SD = 27.6 ± 7.97 vs. 13.7 ± 5.97, p = 0.0033), as shown in Figure 2a, and NK cells (ALS vs. HCs, mean ± SD = 7.4 ± 1.96 vs. 4 ± 1.44, p = 0.0034) (Figure 2b).