At 32:54, when Leah is hanging out at Samuel's apartment, Samuel leaves the living room with a beer bottle in his hand and reaches kitchen without one.
At 52:25, a plastic chart of muscles of a human body from front and back view can be seen in professor Williams' office, which is totally out of place in a cancer research lab.
At 39:32, Samuel and Leah are shown walking outside the city when it was implied in the conversation in the previous scene that Samuel was walking Leah home.
In multiple scenes, erythrocytes are shown getting fused together. But Leah is working on genetically engineered lymphocytes.