With the release of the Jan. 30 data from the California Department of Public Health (CDPH), the statewide total of measles cases has reached 91. Both the number of cases linked to Disney exposures and those not linked have increased. Disney-linked measles cases in California now total 58. Unrelated measles cases in the state total 33.
Nationally, as of Jan.31, there have been 130 measles cases reported from 16 states since the middle of December. The Centers for Disease Control and Prevention (CDC) show 11 of those as recorded for 2014 data. The remainder are 2015 cases.
The Disney-linked measles cases have continued to spread to other states and into Mexico. Six states have reported 13 cases with Arizona reporting the greatest number, with seven illnesses. The national total of Disney-linked measles at this time is 62 cases.
Mexico has reported two measles cases. Both were imported from California. One is Disney-linked and the other is not. Prior to this, Mexico had reported just two measles cases for the two year period 2013-2014.
Public health authorities are concentrating on tracking contacts of infected patients and determining levels of exposure. It is early in the investigation of most cases for a complete profile of the vaccination status of these patients. Various public health agencies have provided some data, however.
The vaccination status is unknown for at least 44 patients. Five patients were infants and too young to be vaccinated. Another 57 patients were never vaccinated for measles.
Of those who had received immunizations, four patients has received one dose of MMR. To be considered fully vaccinated, patients should have two or more doses of the vaccine. Eight of the 130 measles illnesses have been in patients with two or more documented doses of MMR vaccine.
This data is very preliminary. Sources in the public health community suggest that they expect nearly all of those patients with an unknown vaccination status to eventually be found to be unvaccinated.
Three measles cases are creating the most concern in the medical community. A measles patient from outside Fresno County in California was contagious when he visited a maternity ward at a Fresno hospital. KFSN reported Jan. 28 that the infected patient visited the labor and delivery floor of Community Regional Medical Center twice, Jan. 22 and Jan. 25. Infants that could have been exposed at that site have no natural immunity to measles and are too young to be vaccinated.
In metro Phoenix, AZ, a woman with contagious measles is known to have visited a daycare Jan. 20 and Jan. 21. WCNC reported on Jan. 28 that the infected patient visited Phoenix Children’s East Valley Center and may have exposed up to 195 children.
ABC News reported on Jan. 31 that a student at Bard College in Dutchess County, New York, rode an Amtrak train from Penn Station to Rhinecliff, New York, on Jan. 25. She has been diagnosed with measles and was contagious at the time of the trip. That train continued on its route, to Albany and then west through Syracuse, Rochester to Buffalo. Authorities are trying to determine who may have been exposed to measles during her trip.
The latest case of measles has been announced in the District of Columbia. The D.C. Department of Public Health confirmed to WTOP, as revealed in a Jan. 30 story, that the District had seen a confirmed measles illness in 2015. No other detail of the previously unannounced infection were given.