Although the industry has suffered from the outbreak of disease, in 1999 it was worth US$69 million.
Three weeks ago, health officials played down the threat from the outbreak.
The scientists said that there was nothing unusual about the tissue samples from the 1971 outbreak.
Denmark officially remained neutral from the outbreak of the war.
So far, no deaths have been reported from the outbreak.
If the records from the original outbreak are correct, then we have met the conditions for the cure.
A number of deaths have resulted from the outbreak.
In 1939 many players again served in the armed forces from the outbreak of war that September.
No deaths from the current outbreak have been reported, however.
This report described the lessons learned from the outbreak.