The course is divided into 4 days lectures on the following topics:
- Introduction, theory tools, non-perturbative and perturbative aspects
- Vacuum Polarization in Low Energy Physics: g-2
- Vacuum Polarization in High Energy Physics: alpha (M_Z) and alpha at ILC
- Other Applications and Problems (like e^+e^- vs. tau data), future prospects, the role of DAFNE-2