Complex sentence: During this time, Rose secretly escapes from the hospital despite calling Hart to come to her aid, and hitchhikes from various people to Montreal; during this time, she infects one of the truck drivers, causing the driver to begin to attack his colleague.
Split into simpler sentences: During this time, Rose secretly escapes from the hospital despite calling Hart to come to her aid, and hitchhikes from various people to Montreal. She infects one of the truck drivers, causing the driver to attack his colleague.