Jan. 7 — Officials warned the public that a Disneyland visitor may be linked to at least seven confirmed cases of the measles throughout California and two in Utah. Six of the seven California patients were not vaccinated for measles. Doctors suspected the first infected person visited the park sometime between Dec. 15 and Dec. 20, 2014.
Jan. 8 — A Utah Department of Health spokeswoman said both cases in their state were not vaccinated.
Jan. 9 — The Orange County Healthcare Agency reported five more people who visited Disneyland parks were diagnosed with measles. The number of cases in the state goes up to a dozen.
Jan. 10 —Colorado health officials confirmed one patient was diagnosed with measles at a Colorado Springs hospital after visiting a California theme park.
Nineteen people from three states (16 in California, two in Utah, and one in Colorado) contracted measles, health officials said.
Jan. 12 — The Long Beach Health Department confirmed one measles case in the city.
The California Department of Public Health said 26 people in four states have been linked to the Disneyland outbreak.
Jan. 13 — The state health department warned residents of three new cases, two in San Bernardino County and one in Long Beach. At least 22 cases have been linked to the Disneyland visitor in December.
Jan. 23 -- The Ventura County Star, citing bank officials, reports that an employee at a Citibank branch in Camarillo contracted the virus, possibly infecting others who visited the bank.
Jan. 16 — Seven new cases in San Diego were linked to Disneyland outbreak. Two of six infected siblings had visited the park.
Jan. 17 —Health officials reported at least 51 measles cases have been diagnosed since the December outbreak. All but nine were connected to Disney theme parks. Forty-five of those cases have been in California.
Jan. 19 — Sharp Rees-Stealy Rancho Bernardo Urgent Care is closed as a result of a suspected case of measles.
Jan. 20 — After the Department of Health confirmed a student with measles was at Huntington Beach High School sometime between Jan. 6 and Jan 8., administrators told 23 unvaccinated students to stay home for 21 days, the incubation period for measles.
Jan. 21 — Orange County confirmed two new cases of measles, raising its total to 20.
Disney said it will consider refund requests on a "case-by-case" basis.
San Diego County has three new cases, a total of 13.
California health officials say California has now 59 cases of measles this year, 42 of which are related to an initial exposure at Disneyland.
Five Disneyland employees are diagnosed with measles. The Orange County Healthcare Agency said there is still "ongoing measles transmission at Disneyland."
Jan. 27 — The number of reported measles cases in California has grown to at least 73, with 50 of them linked to the Disney theme park outbreak, state health officials said.
Jan. 28 — California State University, Long Beach confirms that a student has been diagnosed with measles. The student, who lives in Orange County, may have exposed at least 20 other students to the virus during an off-campus field trip with the university. It was not immediately clear whether the Long Beach student's case was linked to Disneyland.
Feb. 3 -- Los Angeles County health officials confirm 21 cases of measles, 17 of which are linked to the outbreak triggered at Disneyland.