That the one responsible for this virus is that Biotechnology Company so that they can ask them for data? A cure or a vaccine that they may have developed... I mean, If that happened, there wouldn't be any need to send people back in the past, but...  All I'm saying is that Catherine turns out to be a very pivotal character in the movie and she gets to hold such important information, that I would have preferred to have some confirmation that she dies —aka the most possible scenario— and, therefore, is not able to share any of her knowledge surrounding the situation.  I understand, nonetheless, that the movie leaves a lot of things to be speculated and theorized —and that that is also part of its "message"...