HealthDay News — For immunocompromised adults, adherence to US Centers for Disease Control and Prevention mRNA monovalent COVID-19 booster dose recommendations is low, according to a study published online January 20 in JAMA Network Open.

Sara Y. Tartof, PhD, MPH, from Kaiser Permanente Southern California in Pasadena, and colleagues examined mRNA COVID-19 vaccine uptake and factors associated with uptake among immunocompromised adults from December 14, 2020, through August. 6, 2022, in a cohort study. A total of 42,697 immunocompromised individuals met the eligibility criteria.

The researchers found that 78.0% of the immunocompromised individuals had received a third dose of mRNA COVID-19 vaccine, while only 41.0% had received a fourth dose, corresponding to a primary series and monovalent booster dose. Following the CDC recommendation to receive a second monovalent booster (fifth dose), only 0.9% had uptake. The likelihood of receiving at least four doses was increased for adults aged 65 years or older compared with those aged 18 to 44 or 45 to 64 years (hazard ratios, 3.95 and 2.52, respectively). The likelihood of receiving at least 4 doses was lower for Hispanic and non-Hispanic Black adults versus non-Hispanic White adults (hazard ratios, 0.77 and 0.82, respectively), for individuals with prior documented SARS-CoV-2 vs no infection (hazard ratio, 0.71), and for those receiving vs not receiving high-dose corticosteroids (hazard ratio, 0.88).

“Given the vulnerability of this population to develop severe COVID-19, a renewed focus on targeted and tailored efforts to ensure that immunocompromised individuals remain up to date with continuously evolving COVID-19 booster dose recommendations is warranted at this stage of the pandemic,” the authors write.

Several authors disclosed financial ties to biopharmaceutical companies, including Pfizer, which funded the study.

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