Low Zoster Vaccination Rates in Immunocompromised Veterans

TOPLINE:

A study has found that less than half of US veterans on chronic immunosuppressive medications, and a much lower percentage of those younger than 50 years, received at least one dose of the recombinant zoster vaccine (RZV) by mid-2023; the low rate of herpes zoster vaccination in this immunocompromised group, especially among younger individuals, is concerning.

METHODOLOGY:

• In 2021, the US Food and Drug Administration authorized the use of RZV for adults aged 18 years or older on chronic immunosuppressive medications due to their high risk for herpes zoster and its related complications, followed by updated guidance from the Centers for Disease Control and Prevention and American College of Rheumatology in 2021 and 2022, respectively.
• This study aimed to assess the receipt of RZV among veterans receiving immunosuppressive medications within the Veterans Health Administration (VHA) healthcare system before and after the expanded indications in February 2022.
• It included 190,162 veterans who were prescribed one or more immunosuppressive medications for at least 90 days at 130 medical facilities between January 1, 2018, and June 30, 2023.
• A total of 23,295 veterans (12.3%) were younger than 50 years by the end of the study period.
• The outcome measured was the percentage of veterans with one or more doses of RZV documented during the study period.

TAKEAWAY:

• Among veterans aged 50 years or older, 36.2% and 49.8% received an RZV before the expanded indication and by mid-2023, respectively. Even though the rate of vaccination is higher than that observed in the 2021 National Health Interview Survey, significant room for improvement remains.
• Among veterans younger than 50 years, very few (2.8%) received an RZV before the expanded indication, and only 13.4% received it by mid-2023.
• Demographic factors associated with lower odds of vaccination included male sex, African American or unknown race, and nonurban residence (P ≤ .004 for all).
• Those who received targeted synthetic disease-modifying antirheumatic drugs (DMARDs) alone or in combination with other drugs or those who received other vaccines were more likely to receive RZV than those who received conventional synthetic DMARD monotherapy (P

IN PRACTICE:

“Future work to improve RZV vaccination in patients at high risk should focus on creating informatics tools to identify individuals at high risk and standardizing vaccination guidelines across subspecialties,” the authors wrote.

SOURCE:

This study was led by Sharon Abada, MD, University of California San Francisco. It was published online on October 11, 2024, in JAMA Network Open.

LIMITATIONS:

This study may not be generalizable to nonveteran populations or countries outside the United States. Limitations also included difficulty with capturing vaccinations not administered within the VHA system, which may have resulted in an underestimation of the percentage of patients vaccinated.

DISCLOSURES:

This work was funded by grants from the VA Quality Enhancement Research Initiative and the Agency for Healthcare Research and Quality. Some authors reported receiving grants from institutions and pharmaceutical companies.

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.