Created at	Source	Raw Value	Validated value
Jan. 13, 2021, 12:31 a.m.	usa	COVID-19 PCR test (SARS-CoV-2 nucleic acid detection) Period until the COVID-19 PCR test (SARS-CoV-2 nucleic acid detection) becomes negative	COVID-19 PCR test (SARS-CoV-2 nucleic acid detection) Period until the COVID-19 PCR test (SARS-CoV-2 nucleic acid detection) becomes negative