An interplay between genetic and environmental risk factors, including tobacco smoke exposure, affects brain development in early childhood, which could increase the likelihood a person will develop multiple sclerosis (MS), according to a recent study. Among young children in the Netherlands, being at a high genetic risk for MS,…

Vaccination does not increase the risk of multiple sclerosis (MS) in children and adolescents within five years, a study found. Instead, there was a trend toward a lower risk of pediatric-onset MS in vaccinated children. This in line with earlier findings that vaccination is not a risk factor for…

Hospitalization for severe COVID-19 is significantly associated with a twofold higher risk of developing multiple sclerosis (MS), according to a study involving nearly the entire population of Sweden. No increased risk of MS was found among those who tested positive for SARS-CoV-2, the virus that causes COVID-19, or received…

Having antibodies against the rubella virus is associated with an increased risk of developing multiple sclerosis (MS) in unvaccinated people, a Swedish study suggests. The findings show a rubella infection may be a risk factor for MS, reinforcing the hypothesis that certain viral infections may trigger the misleading immune…

Among immigrants to Canada, the risk of multiple sclerosis (MS) is higher for those who have spent a greater portion of their life in Canada, a new study reports. The study, “Proportion of Life Spent in Canada and the Incidence of Multiple Sclerosis in Permanent Immigrants,”…

Obesity in childhood is associated with a more than double the risk of developing multiple sclerosis (MS) in adulthood, although the overall risk is low, according to a new study. “Our study adds to the evidence that obesity in early life increases the risk for a plethora of diseases…

Getting the Bacillus Calmette-Guerin (BCG) vaccine to protect against tuberculosis (TB) or having latent (inactive) TB in young adulthood aren’t linked to the risk of developing multiple sclerosis (MS), a Norwegian study found. The study, “BCG vaccination and multiple sclerosis risk: A Norwegian cohort study,” was published in…

People with a certain type of genetic makeup who’ve have head trauma may have a risk of developing multiple sclerosis (MS) up to nearly 18 times over those without genetic factors or a history of head trauma, a study shows. “Our study could prompt further research to uncover the…

Genetic changes that predispose people to developing multiple sclerosis (MS) first emerged among herding populations who migrated to Eastern Europe thousands of years ago and then spread across the continent, new research has found. Researchers think these genetic variations may have helped turbocharge the immune system, making it easier…

Women who smoked during pregnancy, and their offspring, showed a significantly higher risk of developing multiple sclerosis (MS) in a recent Danish study. “Our observations add further to the evidence implicating smoking in the development of MS and suggest that intra-uterine exposure to tobacco smoke may increase MS risk,”…

Aubagio (teriflunomide) can significantly reduce the risk of developing multiple sclerosis (MS) among adults with signs of MS-like brain damage who don’t yet have any disease symptoms, according to findings from a clinical trial. The results were presented earlier this year at the American Academy of Neurology…

What a person eats in childhood can influence their future risk of developing multiple sclerosis (MS) and its clinical course, according to a recent Dutch study. A poor diet with more fast food, snacks, and candy as a child tended to be associated with a higher risk of developing…

The protein DDX39B is a master regulator of immune tolerance, or the immune system’s ability to distinguish self from potentially harmful nonself molecules, and helps to control the development of immune cells that are key for this process, a new study shows. Findings suggest that activating DDX39B with small molecules…

People infected with the human immunodeficiency virus (HIV) — including HIV-positive individuals who received antiretroviral treatment at some point after infection — are significantly less likely to develop multiple sclerosis (MS), a new analysis suggests.  The decrease in MS risk was particularly pronounced…

A history of infection with Epstein-Barr virus (EBV) has been shown to be a strong risk factor for developing multiple sclerosis (MS) — but is targeting the virus a viable strategy for MS prevention or treatment? This question was the subject of a debate, “How To…

Teenagers with poor sleep quality or insufficient sleep — those who sleep less than seven hours a night — are 40% to 50% more likely to develop multiple sclerosis (MS) later in life than those who get adequate rest, according to a Swedish population-based study. Differences in sleep timing…

The risk of developing multiple sclerosis (MS) doesn’t seem to be influenced by consuming alcohol, according to a large-scale analysis in the U.K. After adjusting for known MS risk factors, including smoking, childhood obesity, socioeconomic status, or genetics, the findings remained the same. The analysis was published in Nature…

Among people with type 2 diabetes, the use of anti-hyperglycemic medications is associated with a reduced risk of multiple sclerosis (MS) for younger individuals, but an increased risk for older patients, particularly women. That’s according to the study “Age and sex differences on anti-hyperglycemic medication…

Infection with the stomach bacterium Helicobacter pylori (H. pylori) does not appear to protect against the development of multiple sclerosis (MS), a review study has found. However, when researchers focused on studies that used microscopic assessments of tissue instead of other diagnostic methods to detect H. pylori, their data…

How much a country spends on healthcare is associated with the prevalence of multiple sclerosis (MS), with higher spending nations seeing a greater number of MS cases, a study found. MS cases might be underestimated in low-income nations that put less money into the healthcare system, resulting in reduced…

People who had infectious mononucleosis — a contagious disease for which the Epstein-Barr virus (EBV) is the leading cause — had a higher incidence of multiple sclerosis (MS) in the 10 years following diagnosis compared with individuals not diagnosed with the virus, a study found. This link was particularly…

The risk of developing multiple sclerosis (MS) is lower in women with a history of pregnancy and is not affected by the use of oral contraceptives, according to a recent meta-analysis of four published studies. However, the four studies, conducted in the U.S. and Iran, showed considerable variability in…

Most available studies suggest a connection between childhood trauma and multiple sclerosis (MS), from earlier symptom onset to potentially poorer outcomes, but more research is needed to understand this association, a review paper highlights. While several high-quality studies have been published, the scientists noted “considerable heterogeneity [variability] in methodology, including inconsistencies…

Alcohol intake is not significantly associated with an increased risk of developing multiple sclerosis (MS), but specifically drinking beer may elevate the risk, according to a recent meta-analysis. The association, however, was limited by a small number of included studies. “Further large-scale prospective studies should be conducted to verify…

Genetic variants that contribute to a high body mass index (BMI) during childhood are associated with an increased risk of developing multiple sclerosis (MS), a study found. The relationship is likely influenced by the fact that a higher BMI in childhood is linked to obesity in adulthood and a “longer…

Infection with the herpes simplex virus does not increase the risk of multiple sclerosis (MS), according to a new analysis based on genetic data. The study, “Mendelian Randomization Analysis Suggests No Associations of Herpes Simplex Virus Infections With Multiple Sclerosis,” was published in Frontiers in…

While people who smoke cigarettes are more likely to be diagnosed with multiple sclerosis, MS patients who are daily alcohol drinkers are more likely to show signs of faster neurodegeneration, a new study highlights. The findings suggest that quitting smoking and cutting back on alcohol would be beneficial for people…

Eating a lot of green leafy and other vegetables, beans, nuts and berries seems to significantly lower the likelihood of developing multiple sclerosis (MS), according to a study from Iran. The findings also suggest that the chances of developing the disease may be higher in people who eat more…

People who contract infectious mononucleosis — colloquially known as “mono” — during childhood or adolescence are at a roughly two to three times greater risk of developing multiple sclerosis (MS) as adults, a large population-based study suggests. Notably, the study points to mono itself — independent of other factors…

Toxoplasmosis, an infection by the parasite Toxoplasma gondii, has a protective effect against the development of multiple sclerosis (MS), according to a review study. Specifically, people who had been infected with the parasite were 32% less likely to develop MS than those who never had toxoplasmosis. While these findings support T. gondii…