Q: What are the 2 major different risk factors in Acute Eosinophilic pneumonia (AEP) and chronic Eosinophilic pneumonia (CEP)?

Answer:

In AEP men are affected approximately twice as frequently as women - and - AEP has been associated with smoking. 

CEP occurs more frequently in women and does not appear to be related to smoking. But, an association with radiation for breast cancer has been described.