Table-2.

The circulation of DNA viruses in PCV2-positive samples (n = 86 for 2017 and n = 88 for 2021) in Vietnamese pigs.

Viruses	Number of PCV2-positive samples
	Number of positives (%) in 2017	Number of positives (%) in 2021
PPV1	21 (24.4)	21 (23.9)
PPV2	53 (61.6)	3 (3.4)
PPV3	40 (46.5)	24 (27.3)
PPV4	44 (51.2)	12 (13.6)
PBoV	48 (55.8)	58 (65.9)
TTV1	24 (27.9)	13 (14.8)
TTV2	47 (54.7)	56 (63.6)

PPV=Porcine parvovirus, (e.g., PPV1, PPV2, PPV3, and PPV4), PBoV=Porcine bocavirus, TTV=Torque teno virus (TTV1 and TTV2)