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Volume 9, Number 4—April 2003
Research

Dengue Fever in Travelers to the Tropics, 1998 and 1999

Heidi Lindbäck*†, Johan Lindbäck†, Anders Tegnell†, Ragnhild Janzon†, Sirkka Vene†, and Karl Ekdahl†Comments to Author 
Author affiliations: *Uppsala University, Uppsala, Sweden; †Swedish Institute for Infectious Disease Control, Solna, Sweden

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Table 2

Geographic area of DF infection, Swedish travelers to these countries, DF risk, and number of cases and incidence of DF/DHF per 100,000 inhabitantsa,b

Geographic area of infectionc Dengue patients Estimate of all Swedish travelers DF risk/100,000 travelers DF/DHF cases reported to WHO in 1998 DF/DHF incidence rate/100,000/yr
India with its neighboring countriesd
 7
 12,000
 58
 707
 <1
Malay Peninsulae
 79
 264,000
 30
 158,901
 180
China
 0
 32,000
 0
 15
 <1
The rest of Asia, excluding Japanf
 3
 33,000
 9
 181,847
 130
Australia and Pacific Islandsg
 7
 103,000
 7
 132,126
 40
Caribbean Islands
 4
 165,000
 2
 24,545
 121
Central America
 3
 55,000
 5
 67,403
 49
South America
 1
 54,000
 2
 641,299
 217
West Africah
 0
 16,000
 0
 No data
 No data
East Africai
 1
 17,000
 6
 No data
 No data
South Africaj
 0
 38,000
 0
 No data
 No data
Total 105 789,000 13 1,203,831 37

aDF, dengue fever; DHF, dengue hemorrhagic fever; WHO, World Health Organization.
bAs reported to WHO. Data are combined figures for 1998 and 1999, except for information from the WHO report, which covers 1998 (11). The DF/DHF incidence calculations are based only on those countries in the regions reporting DF/DHF cases to WHO.
cCategorized according to the Åre database.
dIndia, Afghanistan, Bangladesh, Bhutan, Nepal, Pakistan, Sri Lanka.
eMalaysia, Singapore, Thailand.
fBrunei, Cambodia, Lao People’s Democratic Republic, Maldives, Myanmar (Burma), North Korea, South Korea, Taiwan, Viet Nam.
gAustralia, Indonesia, New Zealand, Papua New Guinea, Philippines, and other Pacific islands.
hBenin, Burkina Faso, Ivory Coast, The Gambias, Ghana, Guinea, Guinea-Bissau, Cape Verde, Liberia, Mali, Mauretania.
iEthiopia, Kenya, Somalia, Tanzania.
jAngola, Lesotho, Madagascar, Malawi, Mocambique, Namibia, South Africa, Zambia, Zimbabwe.

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