TNF and rheumatoid arthritis: TTV is lower in RA Maggi et al. (67). There is no difference in between TTV viral loads in patients with or without RA Seemayer et al. (68). TTV lower in patients receiving biological therapy than patients receiving conventional DMARD therapy Martín-López et al. (69). TTV levels 3 months after starting anti-TNF therapy are predictive of a disease reduction at month 6 Studenic et al. (45)