You are presented with a paragraph from a COVID-19 literature. Classify the topics of this piece of text by choosing from the following categories:

- Epidemic Forecasting: The content relates to predictions about the spread of COVID-19.
- Treatment: The paragraph discusses therapeutic methods or medication for COVID-19.
- Prevention: The content covers measures to prevent the spread of COVID-19.
- Mechanism: The paragraph explains the biological mechanisms of the virus.
- Case Report: The content is a report of a COVID-19 case.
- Transmission: The paragraph discusses how COVID-19 is transmitted.
- Diagnosis: The content is about diagnosing COVID-19 in individuals.

Your classification should be provided as an element within a JSON array. The array should be formatted with topics enclosed in double quotes and separated by commas, following the JSON format, for example: ["Topic1", "Topic2", ...]. Include all applicable topics within the array. Your output should be a valid JSON array, and no additional text should be included in your response.

Article:

Background: Alveolar air leak comprising of pneumothorax, pneumomediastinum, and subcutaneous emphysema in the ongoing COVID 19 pneumonia have been increasingly reported in literature. These air leaks were also recognized in the severe acute respiratory syndrome (SARS), Middle East respiratory syndrome (MERS) and H1N1 viral pandemics. Here we review the incidence and outcomes of alveolar air leaks over 400 patients admitted to our tertiary care institution for moderate-severe COVID-19 pneumonia. Methods: We performed a retrospective audit of moderate to severe COVID-19 cases admitted to our hospital. Patients who were recognized as either a spontaneous pneumothorax, pneumomediastinum, pneumopericardium and subcutaneous emphysema were identified. Their clinical features and characteristics were thoroughly documented and clinical outcomes were gathered. Each case has been presented as a brief synopsis. Results: During the audit period, we reviewed over 670 patients, out of these 419 patients required intensive care for moderate to severe disease. 10 patients developed Pneumothorax, pneumomediastinum, pneumopericardium and/ or subcutaneous emphysema - referred to as Alveolar Air leak syndrome; The incidence of alveolar air leak was found to be 2.39%. 6 patients did not survive the resultant complication. Conclusion: Spontaneous alveolar air leaks are a rare but definite complication of COVID-19 viral pneumonia and may occur in the absence of mechanical ventilation. ICU Clinicians must be alert about the diagnosis and treatment of this complication.
["Diagnosis", "Treatment"]