© 2004 BMJ Publishing Group Ltd
EDITORIAL
Avian flu
Avian influenza: a human pandemic threat?
Correspondence to:
Correspondence to:
Dr G Rezza
Epidemiology Unit, Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy; g.rezza@iss.it
Another influenza pandemic in humans is inevitable
Keywords: avian influenza; epidemic; H5N1; infectious disease
| The first 150 words of the full text of this article appear below. |
In January 2004, the most serious outbreak of avian influenza in terms of the number of human deaths (22 deaths out of a total of 33 cases in Vietnam and Thailand) began. This outbreak was caused by the viral subtype H5N1 (H (haemoagglutinin) and N (neuraminidase) are viral surface proteins that define specific subtypes) and, to date, constitutes the largest epidemic in commercial poultry,1,2 affecting a number of Asian countries (that is, Cambodia, China, Indonesia, Japan, Lao Peoples Democratic Republic, and the Republic of Korea, in addition to Thailand and Vietnam), where more than 100 million birds either died or were culled in the first two months of 2004.3,4 The high case fatality rate, together with the potential occurrence of human epidemics, have created great public health concern, given the viruses high pathogenicity in humans. The question that remains unanswered, and that is the basic cause of such
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