Community mitigation guidelines to prevent pandemic influenza - United States, 2017

MMWR Recommendations and Reports

Volumn 66, Issue 1, 2017, Pages 1-34

  Qualls, Noreen ^a   Levitt, Alexandra ^b   Kanade, Neha ^a,c   Wright Jegede, Narue ^a,d   Dopson, Stephanie ^e   Biggerstaff, Matthew ^f   Reed, Carrie ^f   Uzicanin, Amra ^a  

^a NATIONAL CENTER FOR EMERGING AND ZOONOTIC INFECTIOUS DISEASES   (United States)

^b NATL CENTER FOR INFECTIOUS DISEASES   (United States)

^c Eagle Medical Services   (United States)

^d Karna LLC   (United States)

^e CENTERS FOR DISEASE CONTROL AND PREVENTION   (United States)

^f NATIONAL CENTER FOR IMMUNIZATION AND RESPIRATORY DISEASES   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

COMMUNITY PARTICIPATION; HUMAN; INFLUENZA A VIRUS (H1N1); INFLUENZA, HUMAN; PANDEMICS; PRACTICE GUIDELINE; UNITED STATES;

COMMUNITY PARTICIPATION; HUMANS; INFLUENZA A VIRUS, H1N1 SUBTYPE; INFLUENZA, HUMAN; PANDEMICS; UNITED STATES;

EID: 85019744946     PISSN: 10575987     EISSN: 15458601     Source Type: Journal    
DOI: 10.15585/mmwr.rr6601a1     Document Type: Article

References (104)

1. Barrios LC, Koonin LM, Kohl KS, Cetron M. Selecting nonpharmaceutical strategies to minimize influenza spread: the 2009 influenza A (H1N1) pandemic and beyond. Public Health Rep 2012;127:565-71. https:// doi.org/10.1177/003335491212700606
2. Monto AS, Webster RG. [Chapter 2]. In: Webster RG, Monto AS, Braciale TJ, Lamb RA, eds. Textbook of influenza. 2nd. West Sussex, UK: John Wiley and Sons, Ltd; 2013:20-33
3. Shrestha SS, Swerdlow DL, Borse RH, et al. Estimating the burden of 2009 pandemic influenza A (H1N1) in the United States (April 2009-April 2010). Clin Infect Dis 2011;52(Suppl 1):S75-82. https://doi.org/10.1093/cid/ciq012
4. Jhung MA, Swerdlow D, Olsen SJ, et al. Epidemiology of 2009 pandemic influenza A (H1N1) in the United States. Clin Infect Dis 2011;52(Suppl 1):S13-26. https://doi.org/10.1093/cid/ciq008
5. CDC. Updated CDC estimates of 2009 H1N1 influenza cases, hospitalizations, and deaths in the United States, April 2009-April 10, 2010. Atlanta, GA: US Department of Health and Human Services, CDC; 2010. https://www.cdc.gov/h1n1flu/estimates_2009_h1n1.htm
6. Labrosse B, Tourdjman M, Porcher R, et al. Detection of extensive crossneutralization between pandemic and seasonal A/H1N1 influenza viruses using a pseudotype neutralization assay. PLoS One 2010;5:e11036. https://doi.org/10.1371/journal.pone.0011036
7. Nougairède A, Ninove L, Zandotti C, et al. Novel virus influenza A (H1N1sw) in South-Eastern France, April-August 2009. PLoS One 2010;5:e9214. https://doi.org/10.1371/journal.pone.0009214
8. CDC. Use of influenza A (H1N1) 2009 monovalent vaccine: recommendations of the Advisory Committee on Immunization Practices (ACIP), 2009. MMWR Recomm Rep 2009;58(No. RR-10)
9. Fell DB, Sprague AE, Liu N, et al; Better Outcomes Registry & Network (BORN) Ontario. H1N1 influenza vaccination during pregnancy and fetal and neonatal outcomes. Am J Public Health 2012;102:e33-40. https://doi.org/10.2105/AJPH.2011.300606
10. Richards JL, Hansen C, Bredfeldt C, et al. Neonatal outcomes after antenatal influenza immunization during the 2009 H1N1 influenza pandemic: impact on preterm birth, birth weight, and small for gestational age birth. Clin Infect Dis 2013;56:1216-22. https://doi. org/10.1093/cid/cit045
11. CDC. Update: novel influenza A (H1N1) virus infection-Mexico, March-May, 2009. MMWR Morb Mortal Wkly Rep 2009;58:585-9
12. CDC. CDC guidance for state and local public health officials and school administrators for school (K-12) responses to influenza during the 2009-2010 school year. Atlanta, GA: US Department of Health and Human Services, CDC; 2010. https://www.cdc.gov/h1n1flu/schools/ schoolguidance.htm
13. CDC. Swine influenza A (H1N1) infection in two children-Southern California, March-April 2009. MMWR Morb Mortal Wkly Rep 2009;58:400-2
14. CDC. Telebriefing on investigation of human cases of H1N1 flu. Atlanta, GA: US Department of Health and Human Services, CDC. May 5, 2009. https://www.cdc.gov/media/transcripts/2009/t090505.htm
15. Kann L, Kinchen S, Modzelski B, et al. ILI-related school dismissal monitoring system: an overview and assessment. Disaster Med Public Health Prep 2012;6:104-12. https://doi.org/10.1001/dmp.2012.13
16. Talaat M, Afifi S, Dueger E, et al. Effects of hand hygiene campaigns on incidence of laboratory-confirmed influenza and absenteeism in schoolchildren, Cairo, Egypt. Emerg Infect Dis 2011;17:619-25. https:// doi.org/10.3201/eid1704.101353
17. Chao DL, Halloran ME, Longini IM Jr. School opening dates predict pandemic influenza A(H1N1) outbreaks in the United States. J Infect Dis 2010;202:877-80. https://doi.org/10.1086/655810
18. Copeland DL, Basurto-Davila R, Chung W, et al. Effectiveness of a school district closure for pandemic influenza A (H1N1) on acute respiratory illnesses in the community: a natural experiment. Clin Infect Dis 2013;56:509-16. https://doi.org/10.1093/cid/cis890
19. Earn DJ, He D, Loeb MB, Fonseca K, Lee BE, Dushoff J. Effects of school closure on incidence of pandemic influenza in Alberta, Canada. Ann Intern Med 2012;156:173-81. https://doi. org/10.7326/0003-4819-156-3-201202070-00005
20. Chowell G, Echevarría-Zuno S, Viboud C, et al. Characterizing the epidemiology of the 2009 influenza A/H1N1 pandemic in Mexico. PLoS Med 2011;8:e1000436. https://doi.org/10.1371/journal.pmed.1000436
21. Community Preventive Services Task Force. Emergency preparedness: school dismissals to reduce transmission of pandemic influenza [Internet]. Guide to Community Preventive Services (The Community Guide); US Department of Health and Human Services, CDC; 2012. https://www.thecommunityguide.org/findings/emergency-preparednessand-response-school-dismissals-reduce-transmission-pandemic-influenza
22. Herrera-Valdez MA, Cruz-Aponte M, Castillo-Chavez C. Multiple outbreaks for the same pandemic: local transportation and social distancing explain the different "waves" of A-H1N1pdm cases observed in México during 2009. Math Biosci Eng 2011;8:21-48. https://doi. org/10.3934/mbe.2011.8.21
23. Nasrullah M, Breiding MJ, Smith W, et al. Response to 2009 pandemic influenza A H1N1 among public schools of Georgia, United States-fall 2009. Int J Infect Dis 2012;16:e382-90. https://doi.org/10.1016/j. ijid.2012.01.010
24. Kimberlin DW, Escude J, Gantner J, et al. Targeted antiviral prophylaxis with oseltamivir in a summer camp setting. Arch Pediatr Adolesc Med 2010;164:323-7. https://doi.org/10.1001/archpediatr.2009.299
25. Ward KA, Armstrong P, McAnulty JM, Iwasenko JM, Dwyer DE. Outbreaks of pandemic (H1N1) 2009 and seasonal influenza A (H3N2) on cruise ship. Emerg Infect Dis 2010;16:1731-7. https://doi. org/10.3201/eid1611.100477
26. Pebody RG, Harris R, Kafatos G, et al. Use of antiviral drugs to reduce household transmission of pandemic (H1N1) 2009, United Kingdom. Emerg Infect Dis 2011;17:990-9. https://doi.org/10.3201/ eid/1706.101161
27. Harvard TH Chan School of Public Health. Harvard Opinion Research Program [Internet]. Public response to H1N1. Boston, MA: Harvard TH Chan School of Public Health. https://www.hsph.harvard.edu/horp/ project-on-the-public-response-to-h1n1
28. CDC. Parental attitudes and experiences during school dismissals related to 2009 influenza A (H1N1)-United States, 2009. MMWR Morb Mortal Wkly Rep 2010;59:1131-4
29. Agolory SG, Barbot O, Averhoff F, et al. Implementation of nonpharmaceutical interventions by New York City public schools to prevent 2009 influenza A. PLoS One 2013;8:e50916. https://doi.org/10.1371/ journal.pone.0050916
30. Klaiman T, Kraemer JD, Stoto MA. Variability in school closure decisions in response to 2009 H1N1: a qualitative systems improvement analysis. BMC Public Health 2011;11:73. https://doi. org/10.1186/1471-2458-11-73
31. Enanoria WT, Crawley AW, Tseng W, Furnish J, Balido J, Aragón TJ. The epidemiology and surveillance response to pandemic influenza A (H1N1) among local health departments in the San Francisco Bay Area. BMC Public Health 2013;13:276. https://doi.org/10.1186/1471-2458-13-276
32. Drago R, Miller K. Sick at work: infected employees in the workplace during the H1N1 pandemic. Institute for Women's Policy Research; 2010: No. B264
33. Potter MA, Brown ST, Cooley PC, et al. School closure as an influenza mitigation strategy: how variations in legal authority and plan criteria can alter the impact. BMC Public Health 2012;12:977. https://doi. org/10.1186/1471-2458-12-977
34. Bell DM, Weisfuse IB, Hernandez-Avila M, Del Rio C, Bustamante X, Rodier G. Pandemic influenza as 21st century urban public health crisis. Emerg Infect Dis 2009;15:1963-9. https://doi.org/10.3201/ eid1512.091232
35. SteelFisher GK. Blendon RJ, Kang M, et al. Adoption of preventive behaviors in response to the 2009 H1N1 influenza pandemic: a multiethnic perspective. Influenza Other Respir Viruses 2015;9:131-42
36. Quinn SC, Parmer J, Freimuth VS, Hilyard KM, Musa D, Kim KH. Exploring communication, trust in government, and vaccination intention later in the 2009 H1N1 pandemic: results of a national survey. Biosecur Bioterror 2013;11:96-106. https://doi.org/10.1089/ bsp.2012.0048
37. Peiris JSM, Yu WC, Leung CW, et al. Re-emergence of fatal human influenza A subtype H5N1 disease. Lancet 2004;363:617-9. https:// doi.org/10.1016/S0140-6736(04)15595-5
38. Gift TL, Palekar RS, Sodha SV, et al; Pennsylvania H1N1 Working Group. Household effects of school closure during pandemic (H1N1) 2009, Pennsylvania, USA. Emerg Infect Dis 2010;16:1315-7. https:// doi.org/10.3201/eid1608.091827
39. Borse RH, Behravesh CB, Dumanovsky T, et al. Closing schools in response to the 2009 pandemic influenza A H1N1 virus in New York City: economic impact on households. Clin Infect Dis 2011;52(Suppl 1):S168-72. https://doi.org/10.1093/cid/ciq033
40. Chen WC, Huang AS, Chuang JH, Chiu CC, Kuo HS. Social and economic impact of school closure resulting from pandemic influenza A/H1N1. J Infect 2011;62:200-3. https://doi.org/10.1016/j. jinf.2011.01.007
41. Mizumoto K, Yamamoto T, Nishiura H. Contact behaviour of children and parental employment behaviour during school closures against the pandemic influenza A (H1N1-2009) in Japan. J Int Med Res 2013;41:716-24. https://doi.org/10.1177/0300060513478061
42. Lau CH, Springston EE, Sohn MW, et al. Hand hygiene instruction decreases illness-related absenteeism in elementary schools: a prospective cohort study. BMC Pediatr 2012;12:52. https://doi. org/10.1186/1471-2431-12-52
43. Holloway R, Rasmussen SA, Zaza S, Cox NJ, Jernigan DB. Updated preparedness and response framework for influenza pandemics. MMWR Recomm Rep 2014;63(No. RR-6)
44. Reed C, Biggerstaff M, Finelli L, et al. Novel framework for assessing epidemiologic effects of influenza epidemics and pandemics. Emerg Infect Dis 2013;19:85-91. https://doi.org/10.3201/eid1901.120124
45. Bell D, Nicoll A, Fukuda K, et al; World Health Organization Writing Group. Non-pharmaceutical interventions for pandemic influenza, national and community measures. Emerg Infect Dis 2006;12:88-94
46. Morse SS, Garwin RL, Olsiewski PJ. Public health. Next flu pandemic: what to do until the vaccine arrives? Science 2006;314:929. https://doi. org/10.1126/science.1135823
47. Hatchett RJ, Mecher CE, Lipsitch M. Public health interventions and epidemic intensity during the 1918 influenza pandemic. Proc Natl Acad Sci U S A 2007;104:7582-7. https://doi.org/10.1073/pnas.0610941104
48. Markel H, Lipman HB, Navarro JA, et al. Nonpharmaceutical interventions implemented by US cities during the 1918-1919 influenza pandemic. JAMA 2007;298:644-54. https://doi.org/10.1001/ jama.298.6.644
49. Institute of Medicine (US). Modeling community containment for pandemic influenza: a letter report. Washington, DC: The National Academies Press; 2006
50. Wu JT, Riley S, Fraser C, Leung GM. Reducing the impact of the next influenza pandemic using household-based public health interventions. PLoS Med 2006;3:e361. https://doi.org/10.1371/journal. pmed.0030361
51. Ferguson NM, Cummings DA, Fraser C, Cajka JC, Cooley PC, Burke DS. Strategies for mitigating an influenza pandemic. Nature 2006;442:448-52. https://doi.org/10.1038/nature04795
52. Institute of Medicine (US) Forum on Microbial Threats. The domestic and international impacts of the 2009-H1N1 influenza A pandemic. Global challenges, global solutions: workshop summary. Washington, DC: The National Academies Press; 2010
53. Halloran ME, Ferguson NM, Eubank S, et al. Modeling targeted layered containment of an influenza pandemic in the United States. Proc Natl Acad Sci U S A 2008;105:4639-44. https://doi.org/10.1073/ pnas.0706849105
54. Collignon PJ, Carnie JA. Infection control and pandemic influenza. Med J Aust 2006;185(Suppl):S54-7
55. Brankston G, Gitterman L, Hirji Z, Lemieux C, Gardam M. Transmission of influenza A in human beings. Lancet Infect Dis 2007;7:257-65. https://doi.org/10.1016/S1473-3099(07)70029-4
56. Hall CB, Douglas RG Jr. Nosocomial influenza infection as a cause of intercurrent fevers in infants. Pediatrics 1975;55:673-7
57. Memoli MJ, Athota R, Reed S, et al. The natural history of influenza infection in the severely immunocompromised vs nonimmunocompromised hosts. Clin Infect Dis 2014;58:214-24. https://doi.org/10.1093/cid/cit725
58. Levy JW, Suntarattiwong P, Simmerman JM, et al. Increased hand washing reduces influenza virus surface contamination in Bangkok households, 2009-2010. Influenza Other Respir Viruses 2014;8:13-6
59. Bean B, Moore BM, Sterner B, Peterson LR, Gerding DN, Balfour HH Jr. Survival of influenza viruses on environmental surfaces. J Infect Dis 1982;146:47-51. https://doi.org/10.1093/infdis/146.1.47
60. Thomas Y, Boquete-Suter P, Koch D, Pittet D, Kaiser L. Survival of influenza virus on human fingers. Clin Microbiol Infect 2014;20:O58-64. https://doi.org/10.1111/1469-0691.12324
61. Cori A, Valleron AJ, Carrat F, Scalia Tomba G, Thomas G, Boëlle PY. Estimating influenza latency and infectious period durations using viral excretion data. Epidemics 2012;4:132-8. https://doi.org/10.1016/j. epidem.2012.06.001
62. Molinari NA, Ortega-Sanchez IR, Messonnier ML, et al. The annual impact of seasonal influenza in the U.S.: measuring disease burden and costs. Vaccine 2007;25:5086-96. https://doi.org/10.1016/j. vaccine.2007.03.046
63. Sato M, Hosoya M, Kato K, Suzuki H. Viral shedding in children with influenza virus infections treated with neuraminidase inhibitors. Pediatr Infect Dis J 2005;24:931-2. https://doi.org/10.1097/01. inf.0000180976.81055.ce
64. Hall CB, Douglas RG Jr, Geiman JM, Meagher MP. Viral shedding patterns of children with influenza B infection. J Infect Dis 1979;140:610-3. https://doi.org/10.1093/infdis/140.4.610
65. Neuzil KM, Hohlbein C, Zhu Y. Illness among schoolchildren during influenza season: effect on school absenteeism, parental absenteeism from work, and secondary illness in families. Arch Pediatr Adolesc Med 2002;156:986-91. https://doi.org/10.1001/archpedi.156.10.986
66. Glezen WP, Couch RB, MacLean RA, et al. Interpandemic influenza in the Houston area, 1974-76. N Engl J Med 1978;298:587-92. https:// doi.org/10.1056/NEJM197803162981103
67. Fox JP, Cooney MK, Hall CE, Foy HM. Influenzavirus infections in Seattle families, 1975-1979. II. Pattern of infection in invaded households and relation of age and prior antibody to occurrence of infection and related illness. Am J Epidemiol 1982;116:228-42. https:// doi.org/10.1093/oxfordjournals.aje.a113408
68. Guclu H, Read J, Vukotich CJ Jr, et al. Social contact networks and mixing among students in K-12 schools in Pittsburgh, PA. PLoS One 2016;11:e0151139. https://doi.org/10.1371/journal.pone.0151139
69. Leecaster M, Toth DJ, Pettey WB, et al. Estimates of social contact in a middle school based on self-report and wireless sensor data. PLoS One 2016;11:e0153690. https://doi.org/10.1371/journal.pone.0153690
70. Hens N, Ayele GM, Goeyvaerts N, et al. Estimating the impact of school closure on social mixing behaviour and the transmission of close contact infections in eight European countries. BMC Infect Dis 2009;9:187. https://doi.org/10.1186/1471-2334-9-187
71. Eames KT, Tilston NL, White PJ, Adams E, Edmunds WJ. The impact of illness and the impact of school closure on social contact patterns. Health Technol Assess 2010;14:267-312. https://doi.org/10.3310/ hta14340-04
72. Nichol KL, Lind A, Margolis KL, et al. The effectiveness of vaccination against influenza in healthy, working adults. N Engl J Med 1995;333:889-93. https://doi.org/10.1056/NEJM199510053331401
73. Monto AS, Davenport FM, Napier JA, Francis T Jr. Modification of an outbreak of influenza in Tecumseh, Michigan by vaccination of schoolchildren. J Infect Dis 1970;122:16-25. https://doi.org/10.1093/ infdis/122.1-2.16
74. Reichert TA, Sugaya N, Fedson DS, Glezen WP, Simonsen L, Tashiro M. The Japanese experience with vaccinating schoolchildren against influenza. N Engl J Med 2001;344:889-96. https://doi. org/10.1056/NEJM200103223441204
75. Mogabgab WJ. Acute respiratory illnesses in university (1962-1966), military and industrial (1962-1963) populations. Am Rev Respir Dis 1968;98:359-79
76. Layde PM, Engelberg AL, Dobbs HI, et al. Outbreak of influenza A/ USSR/77 at Marquette University. J Infect Dis 1980;142:347-52. https://doi.org/10.1093/infdis/142.3.347
77. Sobal J, Loveland FC. Infectious disease in a total institution: a study of the influenza epidemic of 1978 on a college campus. Public Health Rep 1982;97:66-72
78. Pons VG, Canter J, Dolin R. Influenza A/USSR/77 (H1N1) on a university campus. Am J Epidemiol 1980;111:23-30. https://doi. org/10.1093/oxfordjournals.aje.a112871
79. Nichol KL, Heilly SD, Ehlinger E. Colds and influenza-like illnesses in university students: impact on health, academic and work performance, and health care use. Clin Infect Dis 2005;40:1263-70. https://doi. org/10.1086/429237
80. Nichol KL, D'Heilly S, Ehlinger E. Burden of upper respiratory illnesses among college and university students: 2002-2003 and 2003-2004 cohorts. Vaccine 2006;24:6724-5. https://doi.org/10.1016/j. vaccine.2006.05.033
81. Iuliano AD, Reed C, Guh A, et al. Notes from the field: outbreak of 2009 pandemic influenza A (H1N1) virus at a large public university in Delaware, April-May 2009. Clin Infect Dis 2009;49:1811-20. https:// doi.org/10.1086/649555
82. Wang L, Chu C, Yang G, et al. Transmission characteristics of different students during a school outbreak of (H1N1) pdm09 influenza in China, 2009. Sci Rep 2014;4:5982
83. Glass RI, Brann EA, Slade JD, et al. Community-wide surveillance of influenza after outbreaks due to H3N2 (A/Victoria/75 and A/Texas/77) and H1N1 (A/USSR/77) influenza viruses, Mercer County, New Jersey, 1978. J Infect Dis 1978;138:703-6. https://doi.org/10.1093/ infdis/138.5.703
84. Nichol KL, D'Heilly S, Ehlinger EP. Influenza vaccination among college and university students: impact on influenzalike illness, health care use, and impaired school performance. Arch Pediatr Adolesc Med 2008;162:1113-8. https://doi.org/10.1001/archpedi.162.12.1113
85. Wong KK, Shi J, Gao H, et al. Why is school closed today? Unplanned K-12 school closures in the United States, 2011-2013. PLoS One 2014;9:e113755. https://doi.org/10.1371/journal.pone.0113755
86. Russell ES, Zheteyeva Y, Gao H, et al. Reactive school closure during increased influenza-like illness (ILI) activity in Western Kentucky, 2013: a field evaluation of effect on ILI incidence and economic and social consequences for families. Open Forum Infect Dis 2016;3:ofw113
87. Davis BM, Markel H, Navarro A, Wells E, Monto AS, Aiello AE. The effect of reactive school closure on community influenza-like illness counts in the state of Michigan during the 2009 H1N1 pandemic. Clin Infect Dis 2015;60:e90-7. https://doi.org/10.1093/cid/civ182
88. Gatwood J, Meltzer MI, Messonnier M, Ortega-Sanchez IR, Balkrishnan R, Prosser LA. Seasonal influenza vaccination of healthy working-age adults: a review of economic evaluations. Drugs 2012;72:35-48. https://doi.org/10.2165/11597310-000000000-00000
89. Balkhy HH, Memish ZA, Bafaqeer S, Almuneef MA. Influenza a common viral infection among Hajj pilgrims: time for routine surveillance and vaccination. J Travel Med 2004;11:82-6. https://doi. org/10.2310/7060.2004.17027
90. Abubakar I, Gautret P, Brunette GW, et al. Global perspectives for prevention of infectious diseases associated with mass gatherings. Lancet Infect Dis 2012;12:66-74. https://doi.org/10.1016/ S1473-3099(11)70246-8
91. Gutiérrez I, Litzroth A, Hammadi S, et al. Community transmission of influenza A (H1N1)v virus at a rock festival in Belgium, 2-5 July 2009. Euro Surveill 2009;14:19294
92. Rashid H, Haworth E, Shafi S, Memish ZA, Booy R. Pandemic influenza: mass gatherings and mass infection. Lancet Infect Dis 2008;8:526-7. https://doi.org/10.1016/S1473-3099(08)70186-5
93. Rainey JJ, Phelps T, Shi J. Mass gatherings and respiratory disease outbreaks in the United States-should we be worried? Results from a systematic literature review and analysis of the National Outbreak Reporting System. PLoS One 2016;11:e0160378. https://doi. org/10.1371/journal.pone.0160378
94. Blyth CC, Foo H, van Hal SJ, et al; World Youth Day 2008 Influenza Study Group. Influenza outbreaks during World Youth Day 2008 mass gathering. Emerg Infect Dis 2010;16:809-15. https://doi.org/10.3201/ eid1605.091136
95. Shi P, Keskinocak P, Swann JL, Lee BY. The impact of mass gatherings and holiday traveling on the course of an influenza pandemic: a computational model. BMC Public Health 2010;10:778. https://doi. org/10.1186/1471-2458-10-778
96. Benkouiten S, Charrel R, Belhouchat K, et al. Circulation of respiratory viruses among pilgrims during the 2012 Hajj pilgrimage. Clin Infect Dis 2013;57:992-1000. https://doi.org/10.1093/cid/cit446
97. Memish ZA, Assiri A, Turkestani A, et al. Mass gathering and globalization of respiratory pathogens during the 2013 Hajj. Clin Microbiol Infect 2015;21:571.e1-8. https://doi.org/10.1016/j. cmi.2015.02.008
98. Bischoff WE, Swett K, Leng I, Peters TR. Exposure to influenza virus aerosols during routine patient care. J Infect Dis 2013;207:1037-46. https://doi.org/10.1093/infdis/jis773
99. Weber TP, Stilianakis NI. Inactivation of influenza A viruses in the environment and modes of transmission: a critical review. J Infect 2008;57:361-73. https://doi.org/10.1016/j.jinf.2008.08.013
100. Langmuir AD, Pizzi M, Trotter WY, Dunn FL. [Asian influenza surveillance]. Public Health Rep 1958;73:114-20. https://doi. org/10.2307/4590057
101. Lim HC, Cutter J, Lim WK, Ee A, Wong YC, Tay BK. The influenza A (H1N1-2009) experience at the inaugural Asian Youth Games Singapore 2009: mass gathering during a developing pandemic. Br J Sports Med 2010;44:528-32. https://doi.org/10.1136/bjsm.2009.069831
102. Kelso JK, Milne GJ, Kelly H. Simulation suggests that rapid activation of social distancing can arrest epidemic development due to a novel strain of influenza. BMC Public Health 2009;9:117. https://doi. org/10.1186/1471-2458-9-117
103. Sadique MZ, Edmunds WJ, Smith RD, et al. Precautionary behavior in response to perceived threat of pandemic influenza. Emerg Infect Dis 2007;13:1307-13. https://doi.org/10.3201/eid1309.070372
104. Berkman BE. Mitigating pandemic influenza: the ethics of implementing a school closure policy. J Public Health Manag Pract 2008;14:372-8. https://doi.org/10.1097/01.PHH.0000324566.72533.0b