In 2013, bird flu appeared in several countries, mainly in Asia. The disease was
ID: 3172811 • Letter: I
Question
In 2013, bird flu appeared in several countries, mainly in Asia. The disease was determined to have been caused by a virus that could be spread from person to person. This table reflects the total number of reported cases of bird flu and deaths among those cases.
Country
Number of cases of bird flu
Number of deaths from bird flu
China, mainland
5000
350
China, Hong Kong
2000
300
China, Taiwan
700
80
Singapore
200
30
Viet Nam
60
5
Total
7960
765
What is the overall case-fatality rate for the worldwide epidemic of bird flu?
Country
Number of cases of bird flu
Number of deaths from bird flu
China, mainland
5000
350
China, Hong Kong
2000
300
China, Taiwan
700
80
Singapore
200
30
Viet Nam
60
5
Total
7960
765
Explanation / Answer
Overall case fatality rate = total number of deaths from bird flux100/total number of cases of bird flu
= 765/7960 = 9.6% (option D)
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