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: COVID-19 has resulted in extraordinary adversities. Mandates such as distancing and variations to treatment services were implemented to slow transmission of the virus, but created new challenges for persons with Substance Use Disorder (SUD). To better understand this phenomenon, we surveyed healthcare professionals on how they believe COVID-19 has impacted persons with SUD and what needs to occur to effectively treat this vulnerable population. Methods: Attending physicians, residents, nurses, medical and nursing students, and other healthcare professionals were asked to respond to three open-ended questions related to the impact of COVID-19 on persons with SUD. Two independent coders reviewed the comments utilizing constant comparative analysis to develop themes. Results: Common themes of concern were found from the respective participants (n = 205) including: lack of access to treatment, feelings of isolation, negative impacts on mental health, and the possibility of relapse. Healthcare strategies to effectively treat and help persons with SUD included increasing access to treatment including telehealth, development of peer support groups, availability of mental health resources, development of enhanced communication channels between providers and patients, and systematic changes. Conclusion: During the COVID-19 pandemic, overdose deaths have dramatically increased. As the short-term and long-term effects of the pandemic become more apparent, swift and comprehensive responses and policies must be enacted. This study provides insight from healthcare providers on the effects of the pandemic for persons with SUD. Many preexisting issues remain unresolved (e.g. stigma and healthcare disparities), and now the pandemic has presented new obstacles as noted by the providers. The findings from this study provide implications for important discussion regarding the development of strategies for substance use treatment and harm reduction.
["Prevention"]