Dews F. What Percentage of the U.S. Population is Foreign Born? Vol 2017. Washington DC: Brookings; 2013.
Keystone JS. Immigrants Returning Home to Visit Friends & Relatives (VFRs). In: Brunette GW, ed. CDC Health Information for International Travel 2014. New York: Oxford University Press; 2013.
Heywood AE, Zwar N, Forssman BL, et al. The contribution of travellers visiting friends and relatives to notified infectious diseases in Australia: state-based enhanced surveillance. Epidemiology and infection. 2016. doi:
10.1017/S0950268816001734.
Brower S. Demographic Overview of Minnesota. Paper presented at: Minnesota State Demographic Center; September 24, 2015, 2015; St. Paul, MN.
Angell SY, Cetron MS. Health disparities among travelers visiting friends and relatives abroad. Ann Intern Med. 2005;142(1):67-72.
Van Herck K1, Van Damme P, Castelli F, et al. Knowledge, attitudes and practices in travel-related infectious diseases: the European airport survey. J Travel Med. 2004;11(1):3-8.
Bui YG, Trepanier S, Milord F, Blackburn M, Provost S, Gagnon S. Cases of malaria, hepatitis A, and typhoid fever among VFRs, Quebec (Canada). J Travel Med. 2011;18(6):373-378. doi:
10.1111/j.1708-8305.2011.00556.x.
Luise D, Dona D, Visentin F, Marini G, Giaquinto C, Cattelan A. Comparing imported malaria in adults and children presenting to an Italian teaching hospital: A 10-year retrospective study. Travel Med Infect Dis. 2017. doi:
10.1016/j.tmaid.2017.04.008.
LaRocque RC, Deshpande BR, Rao SR, et al. Pre-travel health care of immigrants returning home to visit friends and relatives. Am J Trop Med Hyg. 2013;88(2):376-380. doi:
10.4269/ajtmh.2012.12-0460.
Pitzinger B, Steffen R, Tschopp A. Incidence and clinical features of traveler’s diarrhea in infants and children. Pediatr Infect Dis J. 1991;10(10):719-723.
Chen LH, Wilson ME, Davis X, et al. Illness in long-term travelers visiting GeoSentinel clinics. Emerg Infect Dis. 2009;15(11):1773-1782. doi:10.3201/eid1511.090945.
Monge-Maillo B, Norman FF, Perez-Molina JA, Navarro M, Diaz-Menendez M, Lopez-Velez R. Travelers visiting friends and relatives (VFR) and imported infectious disease: travelers, immigrants or both? A comparative analysis. Travel Med Infect Dis. 2014;12(1):88-94. doi:
10.1016/j.tmaid.2013.07.004.
Leder K, Tong S, Weld L, et al. Illness in travelers visiting friends and relatives: a review of the GeoSentinel Surveillance Network. Clin Infect Dis. 2006;43(9):1185-1193. doi:
10.1086/507893.
Han P, Yanni E, Jentes ES, et al. Health challenges of young travelers visiting friends and relatives compared with those traveling for other purposes. Pediatr Infect Dis J. 2012;31(9):915-919. doi:
10.1097/INF.0b013e318259efbe.
Diemert DJ. Prevention and self-treatment of traveler’s diarrhea. Clin Microbiol Rev. 2006;19(3):583-594. doi:
10.1128/CMR.00052-05.