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:

OBJECTIVES: Here we aimed to estimate how well the excess mortality reflected the burden of COVID-19-related deaths and whether the excess mortality during the outbreak might have resulted in a compensatory reduced mortality after the March-May Covid-19 outbreak in Stockholm, Sweden. METHODS: Using previous 10-year or 5-year average mortalities as a baseline we compared the excess mortality estimates before, during and after the March-May 2020 outbreak in Stockholm. RESULTS: Weekly death estimates revealed that the immediate pre-outbreak and post-outbreak all-cause mortalities did not exceed to excess mortalities regardless of using previous 10-year or 5-year average mortalities. Forty-three days after the start of the outbreak, 74.4% of the total excess mortality was reportedly explained by known COVID-19-related deaths, and here we update that 15 weeks after the start of the outbreak the reported COVID-19-related deaths explained >99% of the total excess mortality. CONCLUSIONS: Exceptional outbreak feature of rapid excess mortality was observed. However, no excess but similarly low mortality was observed immediately prior to the outbreak and post-outbreak, and thus emphasizing the severity of the first wave of COVID-19 outbreak in Stockholm.
["Prevention"]