We would like to thank the staff in Vietnam who supported the study.
Foy BD, Kobylinski KC, Chilson Foy JL, Blitvich BJ, Travassos da Rosa A, Haddow AD, Lanciotti RS, Tesh RB, 2011. Probable non-vector-borne transmission of Zika virus, Colorado, USA. Emerg Infect Dis 17: 880–882.
D’Ortenzio E, Matheron S, Yazdanpanah Y, de Lamballerie X, Hubert B, Piorkowski G, Maquart M, Descamps D, Damond F, Leparc-Goffart I, 2016. Evidence of sexual transmission of Zika virus. N Engl J Med 374: 2195–2198.
Calvet G et al. 2016. Detection and sequencing of Zika virus from amniotic fluid of fetuses with microcephaly in Brazil: a case study. Lancet Infect Dis 16: 653–660.
Petersen EE, Staples JE, Meaney-Delman D, Fischer M, Ellington SR, Callaghan WM, Jamieson DJ, 2016. Interim guidelines for pregnant women during a Zika virus outbreak–United States, 2016. MMWR Morb Mortal Wkly Rep 65: 30–33.
Desai SK, Hartman SD, Jayarajan S, Liu S, Gallicano GI, 2017. Zika virus (ZIKV): a review of proposed mechanisms of transmission and associated congenital abnormalities. Am J Stem Cells 6: 13–22.
Wongsurawat T et al. 2018. Case of microcephaly after congenital infection with Asian lineage Zika virus, Thailand. Emerg Infect Dis 24: 1758–1761.
Miyakawa M, Yoshino H, Yoshida LM, Vynnycky E, Motomura H, Tho LH, Thiem VD, Ariyoshi K, Anh DD, Moriuchi H, 2014. Seroprevalence of rubella in the cord blood of pregnant women and congenital rubella incidence in Nha Trang, Vietnam. Vaccine 32: 1192–1198.
Mikolajczyk RT, Zhang J, Betran AP, Souza JP, Mori R, Gulmezoglu AM, Merialdi M, 2011. A global reference for fetal-weight and birth weight percentiles. Lancet 377: 1855–1861.
Ngwe Tun MM et al. 2013. Serological characterization of dengue virus infections observed among dengue hemorrhagic fever/dengue shock syndrome cases in upper Myanmar. J Med Virol 85: 1258–1266.
Inoue S et al. 2010. Evaluation of a dengue IgG indirect enzyme-linked immunosorbent assay and a Japanese encephalitis IgG indirect enzyme-linked immunosorbent assay for diagnosis of secondary dengue virus infection. Vector Borne Zoonotic Dis 10: 143–150.
Kyaw AK et al. 2017. Clinical, virological and epidemiological characterization of dengue outbreak in Myanmar, 2015. Epidemiol Infect 145: 1886–1897.
Ito M, Takasaki T, Yamada K, Nerome R, Tajima S, Kurane I, 2004. Development and evaluation of fluorogenic TaqMan reverse transcriptase PCR assays for detection of dengue virus types 1 to 4. J Clin Microbiol 42: 5935–5937.
Lanciotti RS, Kosoy OL, Laven JJ, Velez JO, Lambert AJ, Johnson AJ, Stanfield SM, Duffy MR, 2008. Genetic and serologic properties of Zika virus associated with an epidemic, Yap state, Micronesia, 2007. Emerg Infect Dis 14: 1232–1239.
Wilson HL, Tran T, Druce J, Dupont-Rouzeyrol M, Catton M, 2017. Neutralization assay for Zika and dengue viruses by use of real-time-PCR-based endpoint assessment. J Clin Microbiol 55: 3104–3112.
Grard G, Caron M, Mombo IM, Nkoghe D, Mboui Ondo S, Jiolle D, Fontenille D, Paupy C, Leroy EM, 2014. Zika virus in Gabon (Central Africa)–2007: a new threat from Aedes albopictus? PLoS Negl Trop Dis 8: e2681.
World Health Organization, 2016. Available at: https://who.int/health-topics/zika-virus-disease/publications/epidemiology-and-surveillance. Accessed July 31, 2020.
Monath TP, Nystrom RR, Bailey RE, Calisher CH, Muth DJ, 1984. Immunoglobulin M antibody capture enzyme-linked immunosorbent assay for diagnosis of St. Louis encephalitis. J Clin Microbiol 20: 784–790.
Lindsey NP et al. 2018. Ability to serologically confirm recent Zika virus infection in areas with varying past incidence of dengue virus infection in the United States and U.S. territories in 2016. J Clin Microbiol 56: e01115-17.
Martin DA, Muth DA, Brown T, Johnson AJ, Karabatsos N, Roehrig JT, 2000. Standardization of immunoglobulin M capture enzyme-linked immunosorbent assays for routine diagnosis of arboviral infections. J Clin Microbiol 38: 1823–1826.
Singh T et al. 2019. Efficient transplacental IgG transfer in women infected with Zika virus during pregnancy. PLoS Negl Trop Dis 13: e0007648.
Paiva MHS, Guedes DRD, Leal WS, Ayres CFJ, 2017. Sensitivity of RT-PCR method in samples shown to be positive for Zika virus by RT-qPCR in vector competence studies. Genet Mol Biol 40: 597–599.
Cordeiro MT, Pena LJ, Brito CA, Gil LH, Marques ET, 2016. Positive IgM for Zika virus in the cerebrospinal fluid of 30 neonates with microcephaly in Brazil. Lancet 387: 1811–1812.
Haby MM, Pinart M, Elias V, Reveiz L, 2018. Prevalence of asymptomatic Zika virus infection: a systematic review. Bull World Health Organ 96: 402D–413D.
de Araujo TVB et al. 2018. Association between microcephaly, Zika virus infection, and other risk factors in Brazil: final report of a case-control study. Lancet Infect Dis 18: 328–336.
Castanha PMS et al. 2019. Perinatal analyses of Zika- and dengue virus-specific neutralizing antibodies: a microcephaly case-control study in an area of high dengue endemicity in Brazil. PLoS Negl Trop Dis 13: e0007246.
Shapiro-Mendoza CK et al. 2017. Pregnancy outcomes after maternal Zika virus infection during pregnancy - U.S. territories, January 1, 2016–April 25, 2017. MMWR Morb Mortal Wkly Rep 66: 615–621.
Kawai Y et al. 2019. Increased growth ability and pathogenicity of American- and Pacific-subtype Zika virus (ZIKV) strains compared with a Southeast Asian-subtype ZIKV strain. PLoS Negl Trop Dis 13: e0007387.
Mulkey SB et al. 2020. Neurodevelopmental abnormalities in children with in utero Zika virus exposure without congenital Zika syndrome. JAMA Pediatr 174: 269–276.
Centers for Disease Control and Prevention, 2020. Congenital Zika Syndrome & Other Birth Defects. Available at: https://www.cdc.gov/pregnancy/zika/testing-follow-up/zika-syndrome-birth-defects.html. Accessed May 12, 2020.
Honein MA et al. 2017. Birth defects among fetuses and infants of US women with evidence of possible Zika virus infection during pregnancy. JAMA 317: 59–68.
Pomar L et al. 2018. Maternal-fetal transmission and adverse perinatal outcomes in pregnant women infected with Zika virus: prospective cohort study in French Guiana. BMJ 363: k4431.
Reynolds MR et al. 2017. Vital signs: update on Zika virus–associated birth defects and evaluation of all U.S. infants with congenital Zika virus exposure–U.S. Zika pregnancy registry, 2016. Morb Mortal Wkly Rep 66: 366–373.
Rice ME et al. 2018. Vital signs: Zika-associated birth defects and neurodevelopmental abnormalities possibly associated with congenital Zika virus infection–U.S. territories and freely associated states, 2018. Morb Mortal Wkly Rep 67: 858–867.