Multiple choice

While the lethal H5N1 virus has been marching from one country to another, infecting birds and, in some cases, humans, one fact is becoming apparent that as long as the virus persists in birds, be it poultry or wild birds, avian flu outbreaks are bound to recur.The last sentence of the paragraph has been deleted. Which of the following completes the paragraph, most suitably?

  1. Preventive measures may actually have helped spread of the virus.

  2. The virus has developed resistance.

  3. A study highlights the ability of ducks to spread more of the virus and for a longer duration without actually falling sick.

  4. Only the time interval between the outbreaks cannot be determined for sure.

  5. Mass vaccination without other stringent control measures may not be the best strategy.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

None, except (4), continues with the flow.

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