 Wilhelm Siegmund Frei

Wilhelm Siegmund Frei (5 September 1885 – 27 January 1943) was a German dermatologist best known for his contributions to Durand-Nicolas-Favre disease, a sexually transmitted disease found mainly in tropical and subtropical climates.He is also known for the Frei Test, which was developed in 1925 for the detection of lymphogranuloma venereum (LGV).