PMC:7537531 / 6984-7544 JSONTXT

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RNA was extracted from tissue samples, blood and tracheal swabs using the innuPREP Virus RNA kit (Analytic Jena, Jena, Germany) and quantified with a one‐step RT‐qPCR reaction (NEB Luna Universal Probe One‐Step RT‐qPCR kit; New England Biolabs, Ipswitch, MA, USA) and previously published TaqMan primers and probe (Corman 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