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. 2021 Dec 13;16(12):e0259814. doi: 10.1371/journal.pone.0259814

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© 2021 Nouanthong et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 1 — PSL = Phongsaly, LNT = Luang Namtha, HPN = Huaphan, LPB = Luang Prabang, XAY = Xayabouli, NBC = National Blood Centre in Vientiane (VTN), KHM = Khammouane, ATP = Attapeu. Error bars represent the 95% confidence interval. Numbers besides the error bars indicate the percentage per province. Numbers in brackets indicate the number of participants tested for anti-HBc and the total numbers taken into account for calculating the HBsAg prevalence. Due to low serum volumes, not all anti-HBc positive samples could be tested for HBsAg.