Which vaccine was the first to be tested using transgenic mice?

Which of the following protein products has been used to treat emphysema?

Why are transgenic animals produced?

After the safety of a vaccine is successfully tested in $.........$,it can be used in $.........$.

About what percentage of all existing transgenic animals are mice?

Transgenic animals are animals in which a foreign gene is expressed. Such animals can be used to study fundamental biological processes and phenomena, as well as for producing products useful for mankind. Give one example for each type.