Well, it seems like only the initial week or so (IC) is time sensitive for this Arc, the infected individual has to be kidnapped early on and delivered to Gene Co, once that is resolved one way or the other the time skip wouldn't necessarily be a bad thing. Depending on where Racheli ends up the time skip can be attributed to her allies planning to free her, or her hiding underground and waiting out the Virus' progression.

Just my take on it, uninformed as it is.