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:

International and national guidelines have been promoting active aging while creating the necessary means for decision-makers and other relevant actors to work together (governance mechanisms) to implement local and active aging policies. This is especially important in the present COVID-19 pandemic context, posing greater challenges on older people who tend to be self-isolated. How are local actors conceptualizing active aging? What are their priorities related to a healthy life for older people? Which governance mechanisms are used to implement such policies? These are some of the questions addressed in this paper, targeting Portugal, a southern European country. A mixed-methods sequential explanatory design combining a survey conducted at a national level and interviews with key actors in the NUTS III Aveiro Region was employed to identify and understand the underpinning governance mechanisms. Findings confirm the 'passive organization type' in which European politico-territorial studies tend to place Portugal, as there are gaps in the way policies are formulated, implemented and evaluated, as well as a lack of coordination. Results of this study have important impacts on the way local governments and other stakeholders will prepare themselves in the post-pandemic period to design and implement policies addressing active aging.
["Prevention"]