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 is a pandemic affecting mainly respiratory and gastrointestinal system. Severe acute respiratory syndrome coronavirus-2 (SARS-COV-2) binds angiotensin converting enzyme 2 (ACE-2) of renin-angiotensin system (RAS) resulting in hypokalaemia. We hereby report the a of hypokalaemic paralysis induced by COVID-19. Case: A 56 years old male with no co-morbidities presented with fever (2days), weakness in bilateral lower limbs (1 day). His had severe hypokalaemia with serum potassium of 2.05 mEq/L. RT-PCR of nasopharyngeal swab for SARS-CoV- 19 was positive. He was diagnosed as a case of hypokalaemic paralysis induced by COVID-19 infection. Conclusion: We suggest that during this pandemic era if a COVID-19 patient presents with paralysis, hypokalaemia induced paralysis should be kept in the differential diagnosis. What is known: COVID-19 infection leads to hypokalemia. What is new: Hypokalaemic paralysis as a manifestation of COVID-19.
["Case Report"]