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:

At the start of the COVID-19 pandemic in the US, 42.5% of adults and 18.5% of children had obesity(1,2) and less than 50% of the population met physical activity recommendations.(3) Emerging evidence indicates that physical activity declined during the pandemic, likely due in part to school closures and restricted access to common indoor and outdoor places where people are active. Public health interventions are urgently needed to promote an active lifestyle and engagement in physical activity to mitigate the physical and mental adverse impact of COVID-19. (4) The association between obesity and the increased risk of COVID-19 infections, hospitalizations, intensive care unit admissions and death is unequivocal.(5,6) Furthermore, obesity increases the risk of intubation and death in patients less than 65 years old infected with COVID-19, independent of diabetes and hypertension.
["Prevention"]