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:

Coronavirus disease 2019 (COVID--19), caused by severe acute respiratory syndrome coronavirus 2, is characterized by symptoms such as fever, sore throat, cough, fatigue, myalgias, headache, diarrhea, and dysgeusia. In a majority of the cases, it causes mild illness. However, in severe cases, the virus activates the immune system causing systemic inflammation, immune dysregulation, and pro-thrombotic state leading to various complications. Among hospitalized patients with COVID-19, pneumonia, sepsis, and respiratory failure are frequent complications. However, even in the second year of the COVID-19 pandemic, our knowledge of its myriad clinical features and complications is still incomplete and continues to evolve. Here, we present the case of a patient who developed several complications post-COVID-19 one after the other. He was admitted with severe COVID-19 for which he received standard COVID-19 treatment and mechanical ventilation. In the post-COVID-19 state extending up to six months, he serially developed deep vein thrombosis, endogenous endophthalmitis, empyema, and post-inflammatory arthritis of the hip joints. To our knowledge, such a case has not been reported earlier in the literature.
["Case Report"]