The H5N1 virus which causes bird flu was 1st discovered in



[ A ]    1995
[ B ]    2001
[ C ]    1997 right
[ D ]    1991
Answer : Option C
Explanation :
1997.Influenza A virus subtype H5N1, also known as 'bird flu', A (H5N1) or simply H5N1, is a subtype of the influenza A virus which can cause illness in humans & many other animal species. In 2002, new isolates of H5N1 were appearing within the bird population of Hong Kong. H5N1 isolates found in Hong Kong in 1997 & 2001 were not consistently transmitted efficiently among birds & did not cause significant disease in these animals. These new isolates caused acute disease, including severe neurological dysfunction & death in ducks. This was the 1st reported case of lethal influenza virus infection in wild aquatic birds since 1961.
General Science MCQ Questions and Answers for competitive exams

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