Verfaillie (Dutch: [v?rf?i]; born 1957) is a Belgian molecular biologist and professor at the Katholieke Universiteit Leuven (Leuven, Belgium).
Her work on the ability of adult stem cells to differentiate to different cell types has garnered controversy due to accusations of poor laboratory practices and fabrication of data by members of her laboratory.
In 2019 it was shown that several of her more recent paper also contained altered images and potential fraud was committed.