Answer:
Microparasite expert at sucking the blood of mammals and birds
What is common to eat before it's born and after it's dead?
With four oars it swims but it is always at home. Its back is like armor, tougher than chrome. What is it?
What always goes to bed with its shoes on?
I'm a mammal that can fly and I sleep hanging upside down. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?