1. : What is the potential of new flu virus that differ from the bird flu virus?
A. It is larger than the bird flu virus.
B. It can pass to other mammals.
C. It can survive in an arid condition.
2. :
A. In American harbour seals
B. In birds
C. In mammals
3. :
A. Birds
B. Seals
C. Humans
4. :
A. It is the same as the bird strain
B. It can pass to other mammals
C. It causes more severe symptoms
5. :
A. The danger of seal flu to humans
B. The comparison between bird flu and seal flu
C. The effect of a new flu virus on American harbor seals