The Centers for Disease Control and Prevention (CDC) is facing delays in analyzing hundreds of whole measles genome sequences, which could determine whether the United States has lost its measles elimination status. The delay stems from staffing shortages and a learning curve as the CDC and health departments have not previously needed to sequence such large numbers of genomes.
Utah's Public Health Lab has shared most of the 970 measles genomes posted online since January 2025, while the CDC still holds hundreds of sequences that could provide crucial information. The Pan American Health Organization (PAHO) had initially planned an evaluation in April but postponed it until November due to the need for more time from the CDC and ongoing reviews of other countries' statuses.
The use of whole genome sequencing provides a more accurate view compared to traditional methods, which classify measles viruses based on a tiny gene snippet. However, this advanced analysis requires significant specialized knowledge and resources, including expensive equipment and processing costs ranging from $100 to $500 per sequence.
Critics argue that the need for such extensive genomic analysis underscores broader issues with vaccine policy and misinformation. For example, changes made to CDC websites under current leadership have been criticized as spreading misinformation about vaccines causing autism, despite overwhelming scientific evidence
Read the full article at KFF Health News
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