Having to take a poll, I would say that the present evidence of an
association of relapses of
multiple sclerosis is strong for the postâpartum period (Confavreux et al., 1998), is becoming possibly disputable for infections (Sibley et al., 1985; Buljevac et al., 2002), is minor, if any, for trauma (Goodin et al., 1999) and stress (Mohr et al., 2000), and is none for vaccinations, at least in patients free of relapse for >12 months (Confavreux et al., 2001).