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: British Columbia, like many jurisdictions, has a health information telephone service (8-1-1) to provide callers with information by registered nurses and help them decide whether to attend an emergency department or primary care clinic, or manage their concern at home. We describe a new service, HealthLink BC Emergency iDoctor-in-assistance (HEiDi), that partnered physicians available by videoconferencing with 8-1-1 registered nurses to support callers. METHODS: From Apr. 6 to Aug. 2, 2020, all callers to the 8-1-1 telephone service (available to anyone in BC) categorized as "seek care within 24 hours" by registered nurses were eligible for referral to HEiDi. HEiDi physicians ("virtual physicians") connected directly with callers via desktop videoconferencing software, assessed their health complaint, provided advice and suggested care disposition. We conducted a descriptive study and collected demographic characteristics, health concern and disposition determined by the virtual physician. RESULTS: HEiDi virtual physicians provided 7687 consultations. Most patients (n = 4439, 57.8%) were in the 20-64 age range, and 4814 (62.9%) were female. Common health concerns were related to gastroenterology (n = 1275, 16.6%), respiratory (n = 877, 11.4%) and dermatology (n = 874, 11.4%). From the 7531 calls with available data, 2548 (33.8%) callers were advised to attempt home treatment, 2885 (38.3%) to contact a primary care physician within 1 week, 1131 (15.0%) to attend an emergency department immediately and 538 (7.1%) to attend their primary provider now. INTERPRETATION: We found that virtual physicians were able to advise nearly 3 out of 4 (72.1%) patients away from in-person emergency or clinic assessment and 1 in 7 (15.0%) to seek immediate emergency department care. Virtual physicians can provide an effective complement to a provincial health telephone system.
["Prevention"]