Chicago Mpox Cases Spark Fears Of a Summer Resurgence

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Source: https://www.bnnbloomberg.ca/chicago-mpox-cases-spark-fears-of-a-summer-resurgence-1.1918625



Chicago Mpox Cases Spark Fears Of a Summer Resurgence
Madison Muller, Bloomberg News
10h ago

(Bloomberg) -- US health officials are investigating a cluster of new mpox cases in Chicago, more than half of which are in people who were previously vaccinated against the virus.

“No vaccine is 100% effective, and infections after vaccination are possible,” the US Centers for Disease Control and Prevention said in a statement Wednesday.

The CDC said it’s unclear how long the mpox shot — called Jynneos — protects against infection, but that it is currently conducting studies to find out. The agency is also looking at specimen samples to see if the virus has mutated.

The situation has sparked worries that more cases could crop up this summer after the US and other countries largely got a handle on the outbreak last year...​

 

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Source: https://www.idse.net/Viral-Infections/Article/06-23/Chicago-Mpox-Cluster-Still-Confounds/70693


JUNE 28, 2023
Chicago Mpox Cluster Still Confounds

By Ethan Covey

Few questions have been answered, and many remain, as investigators continue to research the cluster of mpox cases that emerged primarily among vaccinated people in Chicago earlier this year.


​As previously reported by Infectious Disease Special Edition, the cluster resulted in 13 confirmed mpox cases reported to the Chicago Department of Public Health (CDPH) from April 17 through May 5, 2023.

The cases were identified following more than two months without reported cases, and came when cases were being identified sporadically or in very small clusters across the United States (MMWR Morb Mortal Wkly Rep 2023;72:696-698).


Additionally, nearly 70% of the Chicago cluster cases occurred among vaccinated individuals—those who had received two doses of JYNNEOS (Bavarian Nordic) or one dose of ACAM2000 (Emergent Product Development Gaithersburg) vaccine.

The CDC and CDPH continued investigating to learn more about the cluster, any similarities among the patients and possible risk factors for mpox virus exposure.

The investigation determined that from March 18 through June 12, 2023, 40 laboratory-confirmed mpox cases were identified in Chicago. Of those, 55% occurred in patients who had received two doses of JYNNEOS or one dose of ACAM2000 vaccine, 13% in those who had received one dose of JYNNEOS vaccine and 33% in those who had not received any vaccines for mpox...