The MMWR Weekly for July 20, 2012 / Vol. 61 / No. 28 includes:
– Pertussis Epidemic — Washington, 2012
– Notes from the Field: Tuberculosis Cluster Associated with Homelessness — Duval County, Florida, 2004–2012
– Notes from the Field: Severe Varicella in an Immunocompromised Child Exposed to an Unvaccinated Sibling with Varicella — Minnesota, 2011

Pertussis Epidemic — Washington, 2012
Since mid-2011, a substantial rise in pertussis cases has been reported in the state of Washington. In response to this increase, the Washington State Secretary of Health declared a pertussis epidemic on April 3, 2012. By June 16, the reported number of cases in 2012 had reached 2,520 (37.5 cases per 100,000 residents), a nearly 1,300% increase compared with the same period in 2011 and the highest number of cases reported in any year since 1942. To assess clinical, epidemiologic, and laboratory factors associated with this increase, all pertussis cases reported during January 1–June 16, 2012, were reviewed. This report describes the results of that review.
– CDC Telebriefing: Pertussis Epidemic in Washington State- 2012 Media Advisory – July 18, 2012
– Reported NNDSS pertussis cases: 1922-2011  [PDF – 108KB]
– Transcript