It generally occurs in people with lung diseases such as asthma, cystic fibrosis or tuberculosis, or those who are immunocompromized such as those who have had a stem cell or organ transplant or those who take medications such as steroids and some cancer treatments which suppress the immune system.
The condition typically arises in people with lung ailments like asthma, cystic fibrosis, or tuberculosis, or individuals whose immune systems are weakened due to factors such as having undergone a stem cell or organ transplant or taking medications that suppress the immune system, including steroids and some cancer therapies.