We have recently seen an increase of varicella cases in schools. I just wanted to take the time to remind everyone that although the varicella vaccine is almost 100% effective at preventing severe cases of varicella, it is not 100% effective at preventing milder cases. Please keep Breakthrough Varicella on your list of possible diagnoses in a vaccinated child with a rash illness.
Diagnosing breakthrough varicella is challenging because of its atypical clinical presentation. It easily can be mistaken for bug bites or other rash illnesses. Below is further information on varicella vaccine effectiveness as well as some clinical information/links to assist you in diagnosing varicella in vaccinated and unvaccinated persons. I have also included infection control information to prevent the spread of varicella to susceptible contacts.
As always, please contact me or the Buncombe County Department of Health and Human Services' (BCHHS) Disease Control staff (250-5109) if you have any questions or concerns. While varicella is not a reportable disease, outbreaks are common and we work with school nurses and administrators to prevent spread to vulnerable populations.
Thanks for all you do for our community,
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Jennifer Mullendore, MD, MSPH
Medical Director
Buncombe County Department of Health and Human Services
Office: (828) 250-6308
[email protected]
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