How do you get inside a human body?

1) Swallowed


or


2) Injected by an insect


or


3) Burrow through the skin

Schistosoma mansoni larva penetrating the skin.

Lambertucci, J. (2010). Acute Schistosomiasis mansoni: Revisited and reconsidered. Memórias do Instituto Oswaldo Cruz. 105. 422-35.

Choose an answer and draw the bit of your parasite that gets you inside a human body, if you went for 1) how would you survive in stomach acid?

Hints:

What shape would it be good to have if you're injected?

How would you pierce the skin and push yourself through?