Risk factors for chronic necrotizing aspergillosis include advanced age, alcoholism, diabetes, and mild immunosuppression. Invasive pulmonary aspergillosis is mainly seen in severely immunocompromised people, especially those with hematological malignancies (cancers of the blood), bone marrow transplant recipients, and people on long-term corticosteroid therapy, such as prednisone. Allogeneic bone marrow transplant recipients have the highest risk of getting invasive aspergillosis. Lung transplant recipients are also at high risk. Parasitic
Parasitic infections associated with cavitations include echinococcosis and paragonimiasis. Echinococcus is a tapeworm that most commonly infects dogs; people become infected by ingesting food or water that contains Echinococcus eggs. This results in cysts forming in the body, most commonly in the liver, but lung involvement is seen in 10-30% of cases. The cysts in the lung sometimes look like cavities on imaging. Paragonimus westermani, also called the lung fluke, is a flatworm which is transmitted by eating freshwater crabs or crayfish containing metacercaria (the infective form of the tapeworm). They mature into adult lung flukes in the lung, where cavitations may be seen in 15-59% of cases. Paragonimiasis is common in East Asia and Southeast Asia. Noninfectious causes
Lung cancer
The most common cause of a single lung cavity is lung cancer. Usually, the cavity forms because the cancer grows more rapidly then its blood supply, resulting in necrosis (cell death) in the central part of the cancer. 81% of lung cancers that develop cavities over-express epidermal growth factor receptor (EGFR), which could be related to rapid growth, central necrosis, and cavity formation.
United States
Currently, the federal regulation that describes infection control standards, as related to occupational exposure to potentially infectious blood and other materials, is found at 29 CFR Part 1910.1030 Bloodborne pathogens. See also
Pandemic prevention – Organization and management of preventive measures against pandemics
Wong, P., & Lim, W. Y. (2020). Aligning difficult airway guidelines with the anesthetic   COVID-19 guidelines to develop a COVID-19 difficult airway strategy: A narrative review. Journal of Anesthesia, 34(6), 924-943. https://doi.org/10.1007/s00540-020-02819-2

Footnotes
External links
Association for Professionals in Infection Control and Epidemiology is primarily composed of infection prevention and control professionals with nursing or medical technology backgrounds
The Society for Healthcare Epidemiology of America is more heavily weighted towards practitioners who are physicians or doctoral-level epidemiologists. Regional Infection Control Networks
The Certification Board of Infection Control and Epidemiology, Inc.
Association for Professionals in Infection Control and Epidemiology