Introduction: Therefore, the prevalence of these mutants was analyzed in 25 COVID-19 patients admitted to our hospital located in Tohoku rural area from December 2020 to April 2021 by polymerase chain reaction (PCR)-based detection kits (VirSNiP-SAS B1351 (484K+501Y), SARS-CoV-2 Spike P681Y, and del H69/N70, respectively; Roche, Basel, Switzerland).
SARS_CoV_2 mutation literature information.
PMID: 
2021
Infection and drug resistance
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