In Memoriam John J. Holland (1929-2013): a Pioneer in Molecular Virology

John J. Holland, Professor Emeritus of Biological Sciences at the University of California, San Diego, died in October, 2013. John was a pioneer in RNA virology, changing the way we think about RNA virus evolution. He was a scientific leader who served the virology community at the international, national, and university levels. John was an outstanding teacher and mentor who will be greatly missed. We thank John9s many friends, colleagues, trainees, and family for contributing their remembrances of this remarkable scientist.