ABSTRACT
Background: As patients with immune conditions were excluded from COVID-19 vaccine clinical trials, it is important to accumulate realworld data in this setting, particularly to identify those who would benefit from repeated doses. Method(s): Effectiveness and Safety of COVID-19 Vaccine in Patients with Inflammatory Bowel Disease (IBD) Treated with Immunomodulatory or Biological Drugs (ESCAPE) is a prospective, multicentre, observational study assessing effectiveness and safety of COVID-19 vaccines in patients with IBD (ClinicalTrials.gov ID: NCT04769258). Here we present data on the rate of breakthrough SARS-CoV-2 infections in the timeframe between 14 days after the second dose and the third dose of COVID-19 vaccine (or a maximum of 9 months from the second dose). The risk factors for SARS-CoV-2 infection, including lack of seroconversion (cut-off for IgG anti-SARS-CoV-2: OD 0.28) and IgG anti-SARS-CoV-2 levels after 8 weeks from the second dose, and treatment for IBD, were assessed. Result(s): Out of the 1076 patients with IBD enrolled in the ESCAPE study, data on breakthrough SARS-CoV-2 infection were available in 953 cases. Most of the patients received homologous, doubledose mRNA-based vaccines (BNT162b2 or mRNA-1273: 99.2%). Seroconversion was reported in 92.7% of cases (median OD 1.60 [IQR 0.8-3.6]), while SARS-CoV-2 infection was documented in 95 patients (10.0%), of whom 9 died. At multivariable regression analyses, age (OR 0.97, 95% CI 0.96-0.99;p<0.001) being former smoker (OR 2.23, 95% CI 1.26-3.88;p=0.005), and lack of seroconversion (OR 0.42, 95% CI 0.20-0.99;p=0.034) were independent predictors of SARS-CoV-2 infection. Conversely, none of the treatments for IBD was associated with breakthrough SARS-CoV-2 infection. Notably, all 9 patients who died had reported seroconversion after the second dose. Conclusion(s): IBD patients without seroconversion after COVID-19 vaccines are at increased risk for SARS-CoV-2 infection, while medications for IBD had no impac.
ABSTRACT
Introduction: Patients on immunosuppressive drugs have been excluded from COVID-19 vaccines trials, creating concerns regarding their efficacy in this setting. Aims & Methods: Effectiveness and Safety of COVID-19 Vaccine in Patients with Inflammatory Bowel Disease (IBD) Treated with Immunomodulatory or Biological Drugs (ESCAPE-IBD) is a prospective, multicentre study promoted by the Italian Group for the study of Inflammatory Bowel Disease. We present data on serological response eight weeks after the second dose of COVID-19 vaccination in IBD patients and healthy controls (HCs). Result(s): 1076 patients with IBD and 1126 HCs were analyzed. Seropositivity for anti-SARS-CoV-2 IgG was reported for most IBD patients, even if with a lesser rate compared with HCs (92.1% vs. 97.9%;p<0.001). HCs had higher antibody concentrations (median OD 8.72 [IQR 5.2-14-2]) compared to the whole cohort of IBD patients (median OD 1.54 [IQR 0.8-3.6];p<0.001) and the subgroup of IBD patients (n=280) without any treatment or on aminosalicylates only (median OD 1.72 [IQR 1.0-4.1];p<0.001). IBD patients treated with anti-TNFs showed significantly lower median anti-SARS-CoV-2 IgG levels compared with those without any treatment or on aminosalicylates only (OD 1.30 [IQR 0.7-3.0] vs.1.72 [IQR 1.0-4.1];p<0.001), those treated with Vedolizumab (OD 1.78 [IQR 1.1-4.1];p=0.001), and Ustekinumab (OD 1.71 [IQR 0.9-4.9];p=0.03). Conclusion(s): Although most IBD patients showed seropositivity after two doses of COVID-19 vaccines, the magnitude of the humoral response was significantly lower than in HCs. Differently from other studies, these findings seem to be mostly unrelated to the use of immune-modifying treatments. Regarding COVID-19 vaccination, patients with IBD should be regarded as a whole as a "frail" category, therefore requiring booster/additional doses of COVID-19 vaccine.