The measles outbreak tied to Disneyland continued to spread anxiety Friday as two new cases emerged overnight in Marin County in California — along with at least one in Nebraska — while Arizona officials warned that at least 1,000 people may have been exposed to the virus through seven others in that state.

Since Jan. 1, the federal Centers for Disease Control and Prevention have confirmed 84 measles cases in 14 states. California’s health department, which is updating a measles count more frequently, has found more than 90 cases in the United States and Mexico so far, with 52 linked to the Disneyland outbreak.

Concern about the highly contagious disease intensified Friday in several states, including Minnesota, where health officials are notifying hundreds of people who may have come into contact with a University of Minnesota student with measles.

There was also anxiety in Arizona, where thousands of people are arriving in Phoenix for the Super Bowl on Sunday. The disease centers are now advising anyone with symptoms not to attend the game.