Paper used in polio vaccines is being tested on the ground in China.
The paper was delivered to a poultry processing plant in the western province of Gansu, according to the Chinese state news agency Xinhua.
The process to make the paper involves washing the infected deer with a chemical and then burning it in an oven.
The infected animals are then treated with antibiotics.
It is hoped the paper can be used in vaccine production.
In a separate development, the BBC’s Jeremy Bowen reports that the BBC has discovered a second polio virus that has been found in two US troops stationed in Japan.
The two soldiers were tested and found to be polio-free, the US military said in a statement.
In the first test, a small amount of the virus was detected in the soldiers’ blood, but the second test found the virus in their urine and saliva, the statement said.
The military said they were now investigating the virus.
The World Health Organisation says polio is one of the most common infections in the world, with more than 5.5 million people killed in countries around the world.