In 2002 Hood began progressing in his vision of the future of medicine: first focusing on predictive and preventive (2P) Medicine, then predictive, preventive and personalized (3P) Medicine and finally predictive, preventive, personalized and participatory which led to the current concept of P4 Medicine. Hood states that P4 Medicine is the convergence of systems medicine (see above), big data and patient (consumer) driven healthcare and social networks.