Abstract
Coronavirus disease (COVID-19) started to occur in South Korea by means of inflow of the virus from abroad, when a case from Wuhan, China, was first confirmed on January 19, 2020. Although South Korea has drastically reduced the number of new confirmed cases and is stabilizing the situation with its exemplary disease prevention policies, there remains a problem. These are cases that had shown negative results to polymerase chain reaction (PCR) (gene amplification) tests as the COVID-19 virus had become undetectable but turned re-positive after a short period. The Central Clinical Committee determined that these re-positive cases after COVID-19 viral clearance are due to the limits of the test method; it is considered that the genetic material of the "dead virus" remaining in a recovered patient's body is amplified during the test process. Comprehending the above evidence, re-positive cases of COVID-19 are not infectious; the virus is not even reactivated. However, further research is required as we lack research results on this subject. Until we can be sure, social distancing and other such policies should be maintained.
Highlights
Coronavirus disease (COVID-19) started to occur in South Korea by means of inflow of the virus from abroad, when a case from Wuhan, China, was first confirmed on January 19, 2020
By March 10, 2020, COVID-19’s strong infectivity affected approximately 118,000 patients and killed approximately 4200 people around the world in places such as East Asia, Europe, and North America, causing WHO to declare the situation a pandemic on March 11, 2020.3 SARS-CoV-2 is a type of betacoronavirus originating from animals, with 86.9% genetic homology with bat SARS-like coronavirus.[4]
The 229E, OC43, NL63, and HKU types of human coronaviruses are mostly seasonal respiratory viruses causing minor upper airway infection; on the other hand, SARS-coronavirus and Middle East respiratory syndrome (MERS)-coronavirus, which belong to the beta-coronavirus group, result in severe pneumonia
Summary
Coronavirus disease (COVID-19) started to occur in South Korea by means of inflow of the virus from abroad, when a case from Wuhan, China, was first confirmed on January 19, 2020. The total number of confirmed cases present on April 29 is 10,761, with 8922 (82.9%) among them released from quarantine.
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