What causes Aspergillosis?
Aspergillus enters the body when you breathe in the fungal spores (“seeds”). This fungus is commonly found in your lungs and sinuses. If your immunity (the ability to “!ght off” infections) is normal, the infection can be contained and may never cause an illness. However, a weak immune system or having a chronic lung disease allows the Aspergillus to grow,  invade your lungs and spread throughout your body.
This may happen if you:

• have a cancer such as leukemmia or aplastic anemia
• take chemotherapy or are on corticosteroids for a long term
• had an organ transplant (kidney or lung)
• have advanced HIV infection 
• have a chronic lung disease like asthma, emphysema, tuberculosis or cystic fibrosis.