Women with multiple sclerosis can navigate labor and delivery as successfully as healthy women, a Canadian retrospective cohort study found.Facing skepticism from U.S. and European regulators, Merck KGaA has given up efforts to gain approval for the oral immunosuppressant drug cladribine for multiple sclerosis, the company announced.The yellow fever vaccine has been linked with more than a 10-fold increase in rates of MS exacerbation in a small study.Adults with a history of chicken pox or shingles infections had a fourfold increased risk for developing multiple sclerosis, researchers said.MONTREAL -- Prior exposure to interferon-beta or glatiramer acetate (GA) did not seem to diminish the effectiveness of teriflunomide, the investigational multiple sclerosis drug, in a phase III trial, a researcher said.MONTREAL -- A common retinal imaging technology could eventually supplement or even replace MRI scans for tracking multiple sclerosis severity and progression, researchers suggested here.MONTREAL -- Adding the investigational, oral drug teriflunomide to glatiramer acetate (GA, Copaxone) in patients with relapsing multiple sclerosis substantially decreased the MRI lesion burden, although the effect on relapse rates was less clear, a researcher said here.