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:

Vaccine-induced immune thrombotic thrombocytopenia (VITT) is diagnosed if there is venous or arterial thrombosis with thrombocytopenia caused by antibodies against platelet factor 4 (PF4) that activate thrombocytes and is confirmed by a heparin-induced platelet activation (HIPA) test, occurring 4 to 28 days after vaccination against COVID19. This extremely rare syndrome has been recognized after Astra Zeneca (reporting incidence 0.91 per 100.000) and Janssen vaccins (0.22 per 100.000). Causality with the vaccine is difficult to ascertain if the HIPA test is negative, or if there is severe thrombosis (such as cerebral sinus or splanchnic thrombosis) without thrombocytopenia. Symptoms compatible with thrombosis or bleeding occurring in a specific time window after vaccination should prompt urgent assessment of the thrombocyte count and appropriate diagnostic tests. Heparin-like anticoagulants should be avoided and central laboratory assessment is essential. Early recognition likely improves prognosis of this extremely rare but severe complication of vaccination against COVID-19.
["Treatment", "Diagnosis"]