The Measles Success Story In California Shows Signs Of Fading

Harriet Blair Rowan:

A rash of recent measles outbreaks in New York, Texas and Washington state shines a light on California’s largely successful effort in recent years to suppress the disease — though some of the shine might be fading.

A serious measles outbreak that started at Disneyland in December 2014 and carried over into 2015 contributed to a steep increase in vaccination rates among California kindergartners over the following three years. But the gains stopped last year, according to the most recent available data.

In the 2013-14 school year, which immediately preceded the Disneyland outbreak, the percentage of kindergartners enrolled in schools boasting vaccination rates of 95 percent or above — considered the optimal level to avoid contagion — stood at 57 percent. By the 2016-17 academic year, the percentage of kindergarten pupils in schools with optimal vaccination rates had hit 90 percent. In 2017-18, however, it dipped slightly back below 90 percent.

Measles has again gained attention because of five outbreaks so far this year in the U.S., including a serious one in Washington state. Through the first week of February, 101 measles cases have been reported across 10 states. That’s compared with a preliminary count of 372 for all of 2018 and 120 in 2017.