EAD data can serve as an important source of information in epidemiological studies. In particular, EAD data can have a much wider coverage of nonfatal acute health outcomes compared to hospital-based data. Moreover, it is an especially useful source of
data in a country like Japan where there are very few acute health outcome databases
available for non-fatal acute health outcomes. Also, EAD data is available in real time in many countries and can be used for surveillance purposes in the future.