There is a 3-year phase in of it being required. If you don’t have vaccinations, you should get them. Particularly meningococcus.
From http://www.universityofcalifornia.edu/news/uc-plans-require-vaccinations-incoming-students :
“The plan is being phased in over three years. The first phase focuses on building awareness among students about the upcoming requirement, with all fall 2015 incoming UC students receiving notification of the recommended vaccines and the process for making them mandatory. The intent of the plan is to set a baseline for all of UC, but does not prevent individual campuses from setting immunization standards for all students, or implementing the plan more rapidly.”
Also:
http://www.latimes.com/local/education/la-me-uc-vaccines-20150207-story.html