Professional hunt teams are killing deer found in the three km zone and rats are being poisoned. Disposal is a problem because of labor shortages. There are specific rules for cremating carcasses in burning pits that must be hot enough to burn for 36 hours to ensure destruction of the virus. Deep trenches are dug and lined with railroad ties, layers of straw and coal. The carcasses are soaked in oil.
Insufficient land is available for burial and severe weather has made burning difficult.
Coal and diesel fuel are in short supply. Pigs are often used as sentinel animals to root through the soil before a farm brings in new animals. If they become ill, the virus still exists. Forty-seven countries don't have the virus but Canada only recognizes the United States, Australia and New Zealand as free for meat import purposes. There is a disease-free zone south to Panama.