Cancer
You are in luck. You can't catch gay diseases at all because there is no such thing as a gay disease.
Yes, turkeys can and will often catch diseases from chickens. This is why it is advised to keep turkeys and chickens separate, this way the turkeys cannot catch the disease from the chickens.
Swans are herbivores - feeding on reeds, algae and other plants found in or near water.
yes
No, not typically.
James Cook did not catch any notable diseases.
None they are vegetarians so they don't eat meat such as fish Swans are one of the only birds that have small serrations or 'teeth' on the inside of their beaks which enables them to catch small fish, otherwise they are herbivores
Chicken pox
yes
YES
Generally they are NOT herbivores, but unlike other birds they have small jagged 'teeth' and thus are able to catch small fish