. 2014 Sep 2;10(11):663–672. doi: 10.1038/nrneph.2014.159

Table 1. Estimated 'window period' for viral testing^*.

Virus	Time to positive result on serology after infectious exposure (days)	Time to positive result on NAT after infectious exposure (days)	Approximate reduction in window period by NAT (days)
HIV	22 (up to 180)	5.6–10.2	12
HCV	38–94	6.1–8.7	30
HBV	38.3–49.7	20.4–25.7	12

^*The window period for each assay depends on the specific assay performed.

Abbreviations: HBV, hepatitis B virus; HCV, hepatitis C virus; NAT, nucleic acid test.

Table 1. Estimated 'window period' for viral testing*.