Meanwhile, in California, the Orange County Health Care Agency on Tuesday confirmed the first case of measles there in 2019 - a Placentia resident in her 20s who traveled overseas recently, CBS Los Angeles reports. She is now under quarantine after being diagnosed and is considered infectious from April 23 to May 1. The individual is now under voluntary isolation at home.
Everyone who was in the building, not just those at the "Avengers" screening, may have been exposed to the contagious disease.
The woman attended a midnight screening of the "Avengers" blockbuster at the AMC Dine-In Fullerton 20 on Thursday from 11 p.m.to 4 a.m, the Orange County Health Care Agency said. Officials did not say whether the woman had been vaccinated for measles.
Officials in Orange County say the woman, who contracted the disease while visiting a foreign country experiencing an outbreak, was present for the film's opening night at a theater in Fullerton. "It spreads very easily by air and by direct contact with an infected person, and is contagious from approximately four days before the rash appears through four days after the rash appears".
April saw approximately 1,000 students and staff members from two Los Angeles universities be quarantined at home or on campus from a possible measles outbreak.
The 22 states that have reported cases to the CDC are Arizona, California, Colorado, Connecticut, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Maryland, Massachusetts, Michigan, Missouri, Nevada, New Hampshire, New Jersey, New York, Oregon, Texas, Tennessee and Washington.
The measles vaccine is more than 90 percent effective, according to the Centers for Disease Control.