Dr Tozzi is a pediatrician and an epidemiologist with experience in vaccine trials and in surveillance of infectious diseases. He has worked as a researcher with the Italian National Health Institute for more than 15 years. In this period he has worked in several projects concerning the prevention of nosocomial infections, HIV infection in children, and surveillance of transmissible diseases. In this area he had responsibilities in surveillance of enteric bacteria and haemolytic uremic syndrome, in surveillance of pertussis at the European level, and in supporting recommendations on immunization in cooperation with the Italian Ministry of Health. He has been part of the coordination group of a large clinical trial on acellular pertussis vaccines that involved nearly 16000 Italian children. He was also responsible for a study on the effect of thimerosal contained in vaccines on neuropsychological development of children, funded by the US Centers for Disease Control.
In 2004 Dr Tozzi moved to the Bambino Gesu Pediatric Hospital, a large clinical and research centre where he joined the epidemiology unit. In this period he continued to work in vaccine preventable diseases with studies on the epidemiology of rotavirus, on conjugate pneumococcal vaccines and pneumococcal infections, on immunization of children with chronic diseases, on determinants of carrier state for MRSA in children, and on the immunological memory in children who received hepatitis B vaccines. He has been also a cnsultant for WHO for activities on polio eradication and for the investigation on a cluster of severe adverse events to vaccines in India. He is also a component of the Expert Vaccine Group of the European Center for Diseases Control.
Dr Tozzi is the editor of an Italian pediatric journal on allergology and immunology. He performed several KAP studies in different segments of the populations relevant to vaccine attitudes. He has been appointed as scientific responsible for communication of the Italian Pediatric Society and has used web social platforms for communication of scientific information to the general public. He is currently running a study entirely based on an internet platform, for the promotion of preconception counselling. His research activities are currently focused on mathematical models for explaining social contacts in a community and predicting the spread of infectious diseases. He is affiliated of the American Medical Informatics Association, of the Council for Communication and Media and of the Council on Clinical Information Technology of the American Academy of Pediatrics. Since 2009 he is serving the Medical University of Tanzania as a professor in Clinical Epidemiology and preventive medicine for students in pediatrics.