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:

COVID-19 is an ongoing pandemic and an intermediate analysis of the first 300 cases treated in the Infectious Diseases Clinic from Craiova has been performed. We have found that most of the cases were asymptomatic or mild, but the severity of the symptomatic cases increases with age. The main comorbidities associated mainly with the severe cases were high blood pressure, obesity, other cardiac conditions, diabetes mellitus and malignancies. Inflammation, coagulation and metabolic disorders are significantly more expressed in critically ill patients. Fatality rate is relatively low, death seems to be associated with old age.
["Diagnosis"]