The Kindred (Part 1)

As a mysterious new illness begins to spread throughout the Pegasus Galaxy, Teyla is convinced that the father of her child is trying to communicate with her through telepathic visions concerning it. But when Dr Keller discovers it to be a re-engineered form of the Hoffan virus (Poisoning the Well), which renders surviving humans poisonous to the Wraith, the team suspect that Michael is seeking revenge again.