A factor in the controversy is that only the combined vaccine is available through the UK National Health Service. As of 2010 there are no single vaccines for measles, mumps and rubella licensed for use in the UK.[41] Prime Minister Tony Blair gave support to the programme, arguing that the vaccine was safe enough for his own son, Leo,[42] but refusing on privacy grounds to state whether Leo had received the vaccine; in contrast, the subsequent Prime Minister, Gordon Brown, explicitly confirmed that his son has been immunised.[43] Cherie Blair confirmed that Leo had been given the MMR vaccination when promoting her autobiography.[4][44]