Reacción a "Epstein-Barr virus components linked to the development of multiple sclerosis have been identified"

This study shows that in patients with multiple sclerosis (MS), CD4 lymphocytes are activated in response to the Epstein-Barr virus (EBV) in its lytic (infectious) phase, not in the latent phase. Latent EBV is a proven risk factor and even an etiological factor in MS. In this case, the preferential response was against EBV in its lytic phase, which may suggest greater immunological memory against EBV in individuals who later developed MS. Furthermore, current MS drugs decrease this response, suggesting that this could be a mechanism mediating their efficacy.

The article is excellent and of very high quality. The team is highly expert in this area and complements their previous findings. The results are striking because they demonstrate the relevance of immunological memory against this virus in its lytic phase, rather than in its latent phase, which is what was previously known, thus broadening our understanding of the virus's role in MS.

[Regarding potential limitations] Like many clinical studies, it demonstrates an association, but not causality, between EBV lytic infection and the development or activity of MS. However, it provides further evidence.