Infections with BMMF („Bovine Milk and Meat Factors ) in humans provide a clue, why the consumption of cow milk and meat correlates with colon and breast cancers.

E-mail address: zurhausen@dkfz.de

Division episomal‐persistent DNA in cancer‐ and chronic diseases, deutsches krebsforschungszentrum, heidelberg, germany.

Correspondence to: Harald zur Hausen, Deutsches Krebsforschungszentrum, Heidelberg, Germany, E‐mail: