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The novel mutation was more commonly seen in people of recent African ancestry, showing how genetic risk factors can differ between groups, the authors say.

A team of scientists appears to have unearthed a previously unknown genetic trigger for Parkinson’s disease—one much more commonly seen in people with recent African ancestry. They found that those who were born with one or two copies of this associated variant were noticeably more likely to develop Parkinson’s. The results highlight the value of conducting genetic research in diverse populations, the authors say.

A gene variant found almost exclusively in the genomes of people of African ancestry increases the risk of developing Parkinson’s disease, according to an international study of nearly 198,000 participants

A gene variant found almost exclusively in the genomes of people of African ancestry increases the risk of developing Parkinson's disease, according to an international study of nearly 198,000 participants with this genetic background.

Study reveals a significant association between certain viral illnesses, including viral encephalitis and pneumonia-causing flu with an increased risk of developing a neurodegenerative disorder later in life. Researchers say existing vaccines against the viruses may reduce the chances of developing neurodegeneration.