Theoretical Biology and Biophysics Group, Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America.|Theoretical Biology and Biophysics Group, Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America.|Department of Pathology and Laboratory Medicine and Emory Vaccine Center, Emory University, Atlanta, Georgia, United States of America.|University of California Berkeley, School of Public Health, Berkeley, California, United States of America.|New Jersey Medical School, Rutgers University, Newark, New Jersey, United States of America.|Theoretical Biology and Biophysics Group, Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America.|Theoretical Biology and Biophysics Group, Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America.