Are some people more prone to getting interstitial pneumonia?

Depends: " interstitial pneumonias" really are a group of diseases, that have some factors that make them more likely, for example one type called idiopathic pulmonary fibrosis, is more common among certain groups of people like smokers, those who have been found to have certain genes etc, another kind of interstitial pneumonia is caused by sarcoidois, which is more common among people in north europe etc.