I am involved in the application of statistical techniques to problems arising from the health and biomedical sciences. Recently, my attention has focused on statistical issues associated with studies of the natural history of infectious diseases including Human Immunodeficiency Virus (HIV) disease, Severe Acute Respiratory Syndrome (SARS), and H1N1 influenza. I am also investigating statistical tools for community trials for HIV prevention in Africa. Other interests include topics in causal inference and clinical trials, and statistical analyses of adverse health effects associated with therapeutic drugs including Vioxx and Avandia. From a statistical perspective, many of these problems concern survival analysis methods and other techniques for the analysis of incomplete data. I am a former President of the Western North American Region of the Biometric Society, and I was Vice Provost of the Berkeley campus from 1994--2000, and then at the Office of the President from 2007-08. My appointment is joint between Statistics and Biostatistics in the School of Public Health.