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:

BACKGROUND: Given the limited and diverse nature of published literature related to COVID-19 in pediatrics, it is imperative to provide evidence-based summary of disease characteristics for guiding policy decisions. We aim to provide comprehensive overview of epidemiological, clinical and biomarker profile of COVID-19 infection in pediatric population. METHODS: For this umbrella review, published systematic reviews from PubMed and pre-print databases were screened. Literature search was conducted from December 2019 to April 2021. Details of clinical, radiological, laboratory features were collected from each review. Qualitative observations were synthesized and pooled prevalence of mortality and asymptomatic cases were assessed using meta-analysis. RESULTS: Evidence synthesis of 38 systematic reviews included total 1145 studies and 3,34,398 children and adolescents. Review revealed that COVID-19 is relatively milder with better prognosis in pediatrics. However, patients with comorbidity are at higher risk. Meta-analysis of reviews showed that 21.17% (95% CI: 17.818 to 24.729) of the patients were asymptomatic and mortality rate was 0.12% (95% CI:0.0356-0.246). Though there was no publication bias, significant heterogeneity was observed. Fever (48-64%) and cough (35-55.9%) were common symptoms, affecting almost every alternate patient. Ground glass opacities (prevalence range:27.4-61.5%) was most frequent radiographic observation. Rise in C-reactive protein, lactate dehydrogenase and D-dimer ranged from 14-54%, 12.2-50% and 0.3-67% respectively. Some of the included reviews (44.7%-AMSTAR; 13.2%-GRADE) were of lower quality. CONCLUSION: Current umbrella review provides most updated information regarding characteristics of COVID-19 infection in pediatrics and can be used to guide policy decision regarding vaccination prioritization, early screening and identification of at-risk population.
["Diagnosis", "Treatment"]