Amid worldwide fears of Ebola, mathematicians from countries where the deadly virus has broken out are banned from attending the International Congress of Mathematicians in Seoul next week.
In an emergency meeting with the International Mathematical Union on Monday night, the organizing committee decided to cancel the registration a Guinean mathematician, a spokesman said Wednesday.
The committee also advised 12 participants from Nigeria, which is categorized as an Ebola "outbreak-risk" country, not to attend.
It will cancel the registration of more participants if the World Health Organization designates more countries in addition to Guinea, Liberia and Sierra Leone as "spread risk."
No mathematicians from the other two countries had applied.
The quadrennial ICM is the largest event for mathematicians featuring discussions and seminars on mathematics as well as the awarding of the Fields Medal, dubbed the "Nobel Prize of Mathematics."
Some 5,000 mathematicians from about 130 countries are to take part in the event, which opens at the COEX convention center on Aug. 13.