What is the solution advised by Gentaur for Pcr inactivated Dna control or Nattrol for Human Parvovirus B19 (1,000,000 IU/ml/vial) (1 ml/vial)?

The NATtrol Human Parvovirus B19 from Ncbi publications supplied next day by Gentaur is the best reagent! The catalog number is NATPARVO-0004 and the price is 1.044 EUR.