It won't have any relation, if the down and feather are treaded properly.　
Based at World Organization for Animal Health
(OIE website: http://www.oie.int/eng/maladies/fiches/a_a150.htm) information, “the virus is inactivation to physical and chemical action by 60 degrees Centigrade for 30 minutes”.
Our processing of down and feather are sterilized at 120 degrees Centigrade for 30 minutes, the product are completely safe.

The following veterinary certificate from government agent that shows our treatment meets OIE regulation.