| Question | Answer | Article | |
| Which of the three DHV viruses is the most virulent? | DHV-1
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Link to Article | |
| What age of duck is most commonly affected by DHV-1? | Young ducklings less than 6 weeks old
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Link to Article | |
| In what environment is DHV-2 infection seen? | Outdoor ducks kept on open fields, seen only in Norfolk, England
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Link to Article | |
| What are the common clinical signs seen with DHV infections? |
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Link to Article | |
| Which DHV can you vaccinate against? | DHV-1.
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Link to Article | |