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Communicable Diseases and their Control
Human
20
Iceland
20
Influenza
epidemiology
18
isolation and purification
14
France
10
Norway
10
Canada
8
Influenza A virus
8
Orthomyxoviridae
8
Spain
8
Switzerland
8
United Kingdom
8
United States
8
Czech Republic
6
Denmark
6
Disease outbreaks
6
Egypt
6
Israel
6
Russian Federation
6
Thailand
6
Belgium
4
Croatia
4
Finland
4
Germany
4
Ireland
4
Latvia
4
Netherlands
4
Poland
4
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