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- W2261985398 abstract "The 138th session of WHO's Executive Board on Jan 25, 2016, noted both the end of the 2014 Ebola crisis and the beginning of a global public health threat, the outbreak of Zika virus infection in the Americas.1WHOWHO Director General briefs. Executive Board on Zika situation.http://who.int/dg/speeches/2016/zika-situation/en/Date: Jan 28, 2016Google Scholar On Jan 15, 2016, the US Centers for Disease Control and Prevention advised pregnant women to refrain from travelling to countries affected by Zika, given a possible association between Zika virus infection with microcephaly and other neurological disorders.2Petersen EE Staples JE Meaney-Delman D et al.Interim guidelines for pregnant women during a Zika virus outbreak—United States, 2016.MMWR Morb Mortal Wkly Rep. 2016; 65: 30-33Crossref PubMed Scopus (224) Google Scholar On Feb 1, 2016, WHO's International Health Regulations Emergency Committee declared the possible association between Zika virus infection and clusters of microcephaly and other neurological disorders as a Public Health Emergency of International Concern.3WHOWHO statement on the first meeting of the International Health Regulations (2005) (IHR 2005) Emergency Committee on Zika virus and observed increase in neurological disorders and neonatal malformations.http://www.who.int/mediacentre/news/statements/2016/1st-emergency-committee-zika/en/Date: Feb 1, 2016Google Scholar With the spread of the arbovirus to more than 25 countries, Zika virus could be following the geographical spread of dengue and chikungunya, all of which are transmitted by the Aedes aegypti mosquito.1WHOWHO Director General briefs. Executive Board on Zika situation.http://who.int/dg/speeches/2016/zika-situation/en/Date: Jan 28, 2016Google Scholar, 3WHOWHO statement on the first meeting of the International Health Regulations (2005) (IHR 2005) Emergency Committee on Zika virus and observed increase in neurological disorders and neonatal malformations.http://www.who.int/mediacentre/news/statements/2016/1st-emergency-committee-zika/en/Date: Feb 1, 2016Google Scholar The potential role of scheduled international mass gatherings in 2016 could exacerbate the spread of Zika virus beyond the Americas. In Brazil, the Rio Carnival on Feb 5–10 attracts more than 500 000 visitors, and on Aug 5–21 more than 1 million visitors are expected to go to the summer Olympics followed by Paralympic Games on Sep 7–18. Meanwhile, Saudi Arabia expects to host more than 7 million pilgrims from over 180 countries for the Umrah, between June and September, and the Hajj pilgrimage on Sept 8–13.4Al-Tawfiq JA Memish JA Mass gathering medicine: 2014 Hajj and Umra preparation as a leading example.Int J Infect Dis. 2014; 27: 26-31Summary Full Text Full Text PDF PubMed Scopus (67) Google Scholar, 5Ministry of HealthKingdom of Saudi ArabiaHajj 1436—health regulations.http://www.moh.gov.sa/en/hajj/pages/healthregulations.aspxGoogle Scholar Saudi Arabia receives about 7000 pilgrims from Latin America annually. Since the Rio Carnival participants are largely domestic, and the spread of Zika virus is already extensive, it will be challenging to assess if there was excess transmission related to the Carnival. Although winter temperatures mean that mosquito density is expected to be low in Brazil at the time of the Olympics, given the summer time mosquito density in the northern hemisphere, including in Saudi Arabia, the introduction of a few infections to the mosquito population might be sufficient to cause outbreaks of Zika virus in other countries.6Musso D Zika virus transmission from French Polynesia to Brazil.Emerg Infect Dis. 2015; 21: 1887Crossref PubMed Scopus (256) Google Scholar, 7Aziz AT Dieng H Ahmad AH et al.Household survey of container-breeding mosquitoes and climatic factors influencing the prevalence of Aedes aegypti (Diptera: Culicidae) in Makkah City, Saudi Arabia.Asian Pac J Trop Biomed. 2012; 2: 849-857Crossref PubMed Scopus (37) Google Scholar In Brazil, cases of dengue are more frequent from February to May.8Brazil Ministry of HealthBoletim Epidemiológico, volume 47 n° 03, 2016. Monitoramento dos casos de dengue, febre de chikungunya e febre pelo vírus Zika até a Semana Epidemiológica 52, 2015.http://portalsaude.saude.gov.br/images/pdf/2016/janeiro/15/svs2016-be002-dengue-se51.pdfDate: 2016Google Scholar In the regions of Saudi Arabia frequented by pilgrims (Jeddah, Mecca, Medina), Aedes aegypti larvae are present throughout the year, nearly two thirds in indoor habitats. Larvae density is, however, variable and decreases in the months before October. In these regions, where rainfall is rare and unpredictable, reports have suggested all year risk for dengue fever, with dengue seroprevalence ranging from 32% to 57% among general patients seeking medical consultations.7Aziz AT Dieng H Ahmad AH et al.Household survey of container-breeding mosquitoes and climatic factors influencing the prevalence of Aedes aegypti (Diptera: Culicidae) in Makkah City, Saudi Arabia.Asian Pac J Trop Biomed. 2012; 2: 849-857Crossref PubMed Scopus (37) Google Scholar, 9Alhaeli A Bahkali S Ali A Househ MS El-Metwally AA The epidemiology of dengue fever in Saudi Arabia: a systematic review.J Infect Public Health. 2015; (published online June 20.)https://doi.org/10.1016/j.jiph.2015.05.006Crossref PubMed Scopus (49) Google Scholar Although the Olympics and the Hajj are very different events, each of them might favour transmission of Zika virus. The Olympics attracts mostly young healthy adults from middle and upper-middle income groups who live in developed countries. Such visitors are less likely to have been exposed to arbovirus infections and less familiar with mosquito bite prevention than Hajj pilgrims. Sexual transmission of Zika virus from commercial sex workers with asymptomatic infection might also be a possibility for those who attend the Olympics.10Musso D Roche C Robin E Nhan T Teissier A Cao-Lormeau V-M Potential sexual transmission of Zika virus.Emerg Infect Dis. 2015; 21: 359-361Crossref PubMed Scopus (881) Google Scholar By contrast, the Hajj and Umrah participants are more likely to be older adults, many of whom have pre-existing health problems, and about two thirds of them originate from low-income countries and the tropics where personal habits of mosquito bite prevention can be suboptimum.4Al-Tawfiq JA Memish JA Mass gathering medicine: 2014 Hajj and Umra preparation as a leading example.Int J Infect Dis. 2014; 27: 26-31Summary Full Text Full Text PDF PubMed Scopus (67) Google Scholar Also, Umrah and Hajj pilgrims' immersion in religious rituals could reduce personal uptake of mosquito avoidance measures. For Saudi Arabian authorities, it is now a standard procedure to convene international public health consultations each year before the pilgrimage season to develop disease-specific recommendations.4Al-Tawfiq JA Memish JA Mass gathering medicine: 2014 Hajj and Umra preparation as a leading example.Int J Infect Dis. 2014; 27: 26-31Summary Full Text Full Text PDF PubMed Scopus (67) Google Scholar Brazilian authorities in collaboration with the Organizing Committee for the Olympic and Paralympic Games have already outlined vector control measures in the Olympics vicinity.11Fantz A Darlington S Olympics will inspect for water to help prevent Zika. Jan 24, 2016. CNN International Edition.http://edition.cnn.com/2016/01/24/world/olympics-rio-zika/index.htmlGoogle Scholar Although both countries may have robust vector control efforts, no single approach is adequate to prevent mosquito bites and non-vector modes of Zika virus transmission; a combination of measures is needed at personal, community, and policy levels. With the emergence of chikungunya and dengue, Hajj authorities have been proactive in vector control measures. Given that pilgrim flow to Saudi Arabia is continuous, these efforts will help minimise current transmission of Zika virus as well. One important issue is the targeted promotion of options for personal mosquito bite protection—eg, the use of insect repellents, protective clothing, including long-sleeved shirts and trousers, insecticide-treated mosquito nets, and air conditioning in residences.12Centers for Disease Control and PreventionZika virus.http://www.cdc.gov/zikaDate: 2016Google Scholar Despite the uncertainty about sexual transmission of Zika virus,10Musso D Roche C Robin E Nhan T Teissier A Cao-Lormeau V-M Potential sexual transmission of Zika virus.Emerg Infect Dis. 2015; 21: 359-361Crossref PubMed Scopus (881) Google Scholar, 12Centers for Disease Control and PreventionZika virus.http://www.cdc.gov/zikaDate: 2016Google Scholar the promotion of safe sex and provision of condoms is beneficial from a broader health perspective. Health-care providers can be encouraged to use travel health visits as an opportunity to emphasise the need for personal protection against mosquito bites and sexual transmission. Health advice for individuals can be provided during pre-departure health visits that are usually routine for pilgrims travelling to Saudi Arabia. Additionally, by training athletic coaches on prevention of Zika virus transmission, their frequent contacts with athletes can be used to remind athletes about the need for compliance with public health advisories. Public health agencies in the home countries of travellers to Brazil and Saudi Arabia can partner with travel agencies and transport services, including airlines, to engage in communication about risks of disease transmission. Advice on personal protection can be reinforced at points of departure and arrival in home and host countries. Increasing the availability and distribution points of methods to prevent mosquito bites is also crucial. Similar approaches were part of prevention efforts for pandemic influenza A H1N1 in 2009 and Middle East respiratory syndrome (MERS) in 2013 during the Hajj.5Ministry of HealthKingdom of Saudi ArabiaHajj 1436—health regulations.http://www.moh.gov.sa/en/hajj/pages/healthregulations.aspxGoogle Scholar, 13Ebrahim SH Shahul H Memish ZA et al.Pandemic H1N1 and the 2009 Hajj.Science. 2009; 326: 938-940Crossref PubMed Scopus (66) Google Scholar, 14Memish ZA Ebrahim SH Ahmed QA Deming M Assiri A Pandemic H1N1 influenza at the 2009 Hajj: understanding the unexpectedly low H1N1 burden.J R Soc Med. 2010; 103: 386Crossref PubMed Scopus (14) Google Scholar Methods for prevention of mosquito bites can be provided to each traveller at the arrival port before immigration control. Given that Brazil is facing a shortage of supply of insect repellents, global efforts will be needed to procure and distribute them in adequate quantity. In the absence of commercially available rapid test kits and the asymptomatic nature of most Zika virus infections,7Aziz AT Dieng H Ahmad AH et al.Household survey of container-breeding mosquitoes and climatic factors influencing the prevalence of Aedes aegypti (Diptera: Culicidae) in Makkah City, Saudi Arabia.Asian Pac J Trop Biomed. 2012; 2: 849-857Crossref PubMed Scopus (37) Google Scholar it is premature to consider mandatory entry or exit screening and restrictions. Although there are conflicting reports on the value of exit and entry temperature screening,15Bitar DA Goubar A Desenclos JC International travels and fever screening during epidemics: a literature review on the effectiveness and potential use of non-contact infrared thermometers.Euro Surveill. 2009; 14: 19115Crossref PubMed Google Scholar it can help the detection of a few individuals with symptoms and might persuade some people with febrile illness to avoid travel and can help reinforce health advisories. These mass gatherings provide an additional opportunity to undertake research on the transmission and prevention of Zika virus. Preparedness has been the key to success of recent Hajj mass gatherings held amid known risks, such as pandemic influenza A H1N1, MERS, and Ebola outbreaks.4Al-Tawfiq JA Memish JA Mass gathering medicine: 2014 Hajj and Umra preparation as a leading example.Int J Infect Dis. 2014; 27: 26-31Summary Full Text Full Text PDF PubMed Scopus (67) Google Scholar, 13Ebrahim SH Shahul H Memish ZA et al.Pandemic H1N1 and the 2009 Hajj.Science. 2009; 326: 938-940Crossref PubMed Scopus (66) Google Scholar Lessons from Saudi Arabia's success with hosting Hajj during declared pandemics can be helpful to Brazil and the Olympics organisers. The next 4 months will be a crucial period for both Brazilian and Saudi authorities to review emerging research findings on the natural history of Zika virus through expert consultations. International stakeholders can facilitate the needed advocacy and support. With proactive planning and preparedness, the effect of Zika virus infection on mass gatherings participants and their home and host countries can be minimised and the events can be held with a sense of confidence among organisers, participants, and the global community. By doing so, available global and country resources can be used to address the unanticipated course of the Zika virus threat. EG is Director of Peru's Instituto Nacional de Salud. JZ is Deputy Director for Guangxi Centers for Disease Control and Prevention. We declare no competing interests." @default.
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- W2261985398 title "A crucial time for public health preparedness: Zika virus and the 2016 Olympics, Umrah, and Hajj" @default.
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