What is the safest Pcr inactivated Dna control or Nattrol for Influenza A/B Positive Control (6 x 0.5ml/vial)?

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The NATtrol Influenza A H1, External Run Control, Low from Zeptometrix Inc. supplied next day by Genprice is the best choice! The catalog number is NATFLUAH1-ERCL and the price is 278 EUR.