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Updated: Jul 16, 2026

An Improved and High Throughput Respiratory Syncytial Virus (RSV) Micro-neutralization Assay
Published on: January 26, 2019
Durable neutralizing antibodies after remote smallpox vaccination among adults with and without HIV infection
Virginia L Kan1, Jody Manischewitz, Lisa R King
1Infectious Diseases Section, Veterans Affairs Medical Center, Washington, DC, USA.
Abstract:
The only US licensed vaccine with established efficacy against smallpox, Dryvax, is contraindicated for HIV patients. Detectable smallpox-neutralizing antibodies are still present among US adults. This study compared vaccinia-neutralizing antibody titers between 20 HIV-infected and 20 uninfected veterans matched for age and military entry. Vaccinia-neutralizing antibodies were detected in 95% HIV-infected and 100% uninfected veterans; 40% HIV-infected and 70% uninfected adults had protective titers. Therefore, after robust vaccination, neutralizing antibodies are maintained for prolonged times despite CD4 cell depletion.
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