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:

INTRODUCTION: The autumn and winter bronchiolitis epidemics have virtually disappeared in the first year of the COVID-19 pandemic.Our objectives were characterise bronchiolitis during fourth quarter of 2020 and the role played by SARS-CoV-2. METHODS: Prospective multi-centre study performed in Madrid (Spain) between October and December 2020 including all children admitted with acute bronchiolitis. Clinical data were collected and multiplex PCR for respiratory viruses were performed. RESULTS: Thirty-three patients were hospitalised with bronchiolitis during the study period: 28 corresponded to rhinovirus (RV), 4 to SARS-CoV-2, and 1 had both types of infection. SAR-CoV-2 bronchiolitis were comparable to RV bronchiolitis except for a shorter hospital stay. A significant decrease in the admission rate for bronchiolitis was found and no RSV was isolated. CONCLUSION: SARS-CoV-2 infection rarely causes acute bronchiolitis and it is not associated with a severe clinical course. During COVID-19 pandemic period there was a marked decrease in bronchiolitis cases.
["Diagnosis"]