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  • Title: Risk factors for herpes zoster: should people with asthma or COPD be vaccinated?
    Author: Safonova E, Yawn BP, Welte T, Wang C.
    Journal: Respir Res; 2023 Jan 28; 24(1):35. PubMed ID: 36709298.
    Abstract:
    Without vaccination, an estimated 1 in 3 individuals will develop herpes zoster (HZ) in their lifetime. Increased risk of HZ is attributed to impaired cell-mediated immunity, as observed in age-related immunosenescence or in individuals immunocompromised due to disease or immunosuppressive treatments. Most vaccination guidelines recommend HZ vaccination in all adults ≥ 50 years of age, although Shingrix® was recently approved by the U.S. Food and Drug Administration for use in individuals aged ≥ 18 years who are or will be at increased risk of HZ due to immunodeficiency or immunosuppression caused by known disease or therapy, followed by approval by the European Medicines Agency for use in immunocompromised individuals aged ≥ 18 years. Chronic respiratory diseases are also risk factors for HZ. A new meta-analysis reported 24% and 41% increased risks of HZ in those with asthma and chronic obstructive pulmonary disorder (COPD), respectively, compared with healthy controls. Asthma and COPD increase a person's risk of HZ and associated complications at any age and may be further elevated in those receiving inhaled corticosteroids. Despite the increased risks, there is evidence that HZ vaccination uptake in those aged ≥ 50 years with COPD may be lower compared with the age-matched general population, potentially indicating a lack of awareness of HZ risk factors among clinicians and patients. The 2022 Global Initiative for Chronic Lung Disease report recognizes that Centers for Disease Control and Prevention recommended to vaccinate those aged ≥ 50 years against HZ, although health systems should consider the inclusion of all adults with asthma or COPD into their HZ vaccination programs. Further research into HZ vaccine efficacy/effectiveness and safety in younger populations is needed to inform vaccination guidelines. What is the context? After experiencing chickenpox, the varicella-zoster virus remains in the body and can be reactivated years later in a form called herpes zoster, more commonly known as shingles. Although shingles is more common in people aged ≥ 50 years, it is also more likely to occur in people with immune systems that do not work normally, which may include those with respiratory conditions such as asthma and chronic obstructive pulmonary disorder (COPD). This disease can be prevented by vaccination. Therefore, it is important for doctors to know which patients are at increased risk of shingles and who could be considered for vaccination. What is new? This review is the first to summarize the risk of shingles in people with asthma or COPD, drawing together evidence from across the world. It also evaluates the recommended use of different shingles vaccines in these patients, with a focus on two widely used vaccines: Zostavax® (ZVL) and Shingrix® (RZV). Asthma or COPD can make people more likely to develop shingles and related medical complications, even in younger people. Most guidelines recommend vaccination against this disease for those aged 50 years and above, with some also recommending vaccination in people aged 18–49 years who may be at higher risk of shingles. There is limited information on the benefit of shingles vaccination in those aged ≤ 50 years with asthma or COPD, but their increased risk of developing shingles suggests they may also benefit from inclusion in vaccination programs. What is the impact? The data presented in the review suggest that people with asthma or COPD aged 18–49 years could benefit from shingles vaccination. This group is not currently included in most vaccination guidelines, despite the evidence of increased risk of shingles and its complications. More information is needed on the risks and benefits of vaccinating this group to determine if it would be cost-effective.
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