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Table 2 Countries with early child clusters of cases (or school outbreaks) during the influenza pandemic (H1N1-2009)

From: The feasibility of age-specific travel restrictions during influenza pandemics

Country Report month Descriptions
Australia [51] February 2010 The return of children to school in the North American autumn 2009 was associated with a substantial increase in the number of cases of pandemic H1N1 2009 influenza
Australia [52] May 2009 55% of H1N1-2009 cases in Australia and 63% of cases in Victoria to date have been school aged children (5 - 17 years)
Argentina [53] May 2009 First imported case seeded an elementary school outbreak in Buenos Aires, and, within days, several schools reported increasing numbers of cases
Cyprus [54] June 2009 The disease spread quickly, initially among younger people who visited tourist resorts and entertainment clubs or school-aged children who stayed at camping places or summer schools
France [55] July 2009 The first time in France, a confirmed outbreak without history of travel occurred in a secondary school in Toulouse district
Germany [56] June 2009 About two thirds of indigenous cases were associated with two large school-associated outbreaks
Italy [42] December 2009 First cluster of in-country transmission involved a 33-month-old and a 11-year-old child
Japan [57] May 2009 Most of new cases were seen in high school students in western Japan
Macau [58] July 2009 Three locally-infected cases were all local primary school students
Malaysia [59] July 2009 The first case was a student returning from the US followed by multiple clusters in schools, which all involved cases returning from abroad with the infection.
Thailand [48] October 2009 The number of reported cases was most prevalent in primary school students aged 6-12 years, followed by secondary school students aged 13-18 years
United Kingdom [49] August 2009 First confirmed case, a pupil at a school in England, was imported. During the following two weeks, 16 further cases were confirmed with epidemiological links to the first imported case.
United States of America [60] October 2009 In May 2009, one of the earliest outbreaks of 2009 pandemic influenza A virus (pH1N1) infection resulted in the closure of a semi-rural Pennsylvania elementary school