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Objective To examine the frequency of, and risk factors for, disease flare following COVID-19 vaccination in patients with systemic rheumatic disease (SRD). Methods An international study was conducted from 2 April to 16 August 2021, using an online survey of 5619 adults with SRD for adverse events following COVID-19 vaccination, including flares of disease requiring a change in treatment. We examined risk factors identified a priori based on published associations with SRD activity and SARS-CoV-2 severity, including demographics, SRD type, comorbidities, vaccine type, cessation of immunosuppressive medications around vaccination and history of reactions to non-COVID-19 vaccines, using multivariable logistic regression. Results Flares requiring a change in treatment following COVID-19 vaccination were reported by 4.9% of patients. Compared with rheumatoid arthritis, certain SRD, including systemic lupus erythematosus (OR 1.51, 95% CI 1.03, 2.20), psoriatic arthritis (OR 1.95, 95% CI 1.20, 3.18) and polymyalgia rheumatica (OR 1.94, 95% CI 1.08, 2.48) were associated with higher odds of flare, while idiopathic inflammatory myopathies were associated with lower odds for flare (OR 0.54, 95% CI 0.31–0.96). The Oxford-AstraZeneca vaccine was associated with higher odds of flare relative to the Pfizer-BioNTech vaccine (OR 1.44, 95% CI 1.07, 1.95), as were a prior reaction to a non-COVID-19 vaccine (OR 2.50, 95% CI 1.76, 3.54) and female sex (OR 2.71, 95% CI 1.55, 4.72). Conclusion SRD flares requiring changes in treatment following COVID-19 vaccination were uncommon in this large international study. Several potential risk factors, as well as differences by disease type, warrant further examination in prospective cohorts. [ABSTRACT FROM AUTHOR]

Monocyte phenotype and output changes with age, but why this occurs and how it impacts anti-bacterial immunity are not clear. We found that, in both humans and mice, circulating monocyte phenotype and function was altered with age due to increasing levels of TNF in the circulation that occur as part of the aging process. Ly6C+ monocytes from old (18–22 mo) mice and CD14+CD16+ intermediate/inflammatory monocytes from older adults also contributed to this “age-associated inflammation” as they produced more of the inflammatory cytokines IL6 and TNF in the steady state and when stimulated with bacterial products. Using an aged mouse model of pneumococcal colonization we found that chronic exposure to TNF with age altered the maturity of circulating monocytes, as measured by F4/80 expression, and this decrease in monocyte maturation was directly linked to susceptibility to infection. Ly6C+ monocytes from old mice had higher levels of CCR2 expression, which promoted premature egress from the bone marrow when challenged with Streptococcus pneumoniae. Although Ly6C+ monocyte recruitment and TNF levels in the blood and nasopharnyx were higher in old mice during S. pneumoniae colonization, bacterial clearance was impaired. Counterintuitively, elevated TNF and excessive monocyte recruitment in old mice contributed to impaired anti-pneumococcal immunity since bacterial clearance was improved upon pharmacological reduction of TNF or Ly6C+ monocytes, which were the major producers of TNF. Thus, with age TNF impairs inflammatory monocyte development, function and promotes premature egress, which contribute to systemic inflammation and is ultimately detrimental to anti-pneumococcal immunity.

Objectives: The experiences of children with pediatric rheumatic diseases (PRD) during the initial phase of the COVID-19 pandemic have not been well-documented. We sought to determine the effects of the COVID-19 pandemic on protective behaviors, healthcare access, medication management, and education among an international cross-sectional parental survey of children with PRDs., Methods: The COVID-19 Global Rheumatology Alliance Patient Experience Survey was distributed online, and parents of children with parental-reported PRD, with or without COVID-19 infection, were eligible to enroll. Respondents described their child's demographics, adoptions of protective behaviors, healthcare access, changes to immunosuppression, and disruptions in schooling., Results: A total of 427 children were included in the analyses. The most common rheumatic disease was juvenile idiopathic arthritis (40.7%), and most children were taking conventional synthetic diseasemodifying antirheumatic drugs (DMARDs) (54.6%) and/or biologic DMARDs (51.8%). A diagnosis of COVID-19 was reported in five children (1.2%), none of whom required hospitalization. Seventeen children (4.0%) had stopped or delayed their drugs due to concern for immunosuppression, most commonly glucocorticoids. Almost all families adopted behaviors to protect their children from COVID-19, including quarantining, reported by 96.0% of participants. In addition, 98.3% of full-time students experienced disruptions in their education, including cancelations of classes and transitions to virtual classrooms., Conclusion: Despite the low numbers of children with PRDs who developed COVID-19 in this cohort, most experienced significant disruptions in their daily lives, including quarantining and interruptions in their education. The drastic changes to these children's environments on their future mental and physical health and development remain unknown.