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![](https://support.tih.org.pk/wp-content/uploads/2018/05/Blood-Center-Web-800x500.jpg)
Since April 2018, Nucleic Acid Testing (NAT) using Polymerase Chain Reaction (PCR) technology is being used for identifying Hepatitis B and Hepatitis C viruses on every single donor in addition to CLIA which was already being performed. Thus fulfilling FDA (USA) requirement for donor screening.