COVID-19 – rheumatic diseases and rheumatologists

After battling – for more than a year – the SARS-CoV-2 pandemic and its successive waves affecting different regions of the world, the medical community, regardless of the specialization its members represent, has achieved a basic understanding of the main problems this virus poses. The knowledge gained throughout the pandemic concerns a wide range of issues – from the course of the disease, which is often unpredictable, through the methods of therapeutic treatment, to the emergence of the post-COVID phenomena. Since the emergence of the pandemic one of the fundamental problems encountered by the medical community has been the identification of factors that negatively influence the outcome of the infection and those that seem beneficial for the patients. Initially, the age of patients appeared to be particularly relevant in this context, though that conclusion has gradually changed, as the symptomatic infection has begun to affect increasingly younger individuals. During the recent “third wave” of the pandemic in Poland, the symptomatic infection affected mostly people aged 40–60, more often men; these data correlated with the experience of other European countries [1]. The prognosis of the negative outcome of the infection depended to a large extent on the concurrent presence of diseases associated with the metabolic syndrome. Still, the rapid and severe course of the disease has also been observed in younger patients without any significant risk factors identified so far. The question still remains, how do rheumatic diseases (RD) influence the clinical picture of a COVID-19 infection? Does an autoimmune disease, often resulting in immunosuppressive therapy or a predominantly anticytokine biological treatment, e.g. in rheumatoid arthritis, have a negative impact on the course of COVID-19? Data available from the COVID-19 Global Rheumatology Alliance physician registry (C19-GRA) reveal that of the 1,324 studied RD patients 36% were hospitalized and 6% died [2]. The use of mechanical ventilation was necessary in 26% of cases. Data from the United States indicated that African American patients, Latinx patients and Asian patients (OR = 2.74, 1.71, 2.69 respectively) had in multivariable models higher odds of hospitalization compared to White patients, with no differences between ethnicities in mortality being revealed [2, 3]. These findings are still to be verified, as all the registries are voluntary, which may result in errors in patient selection and incomplete data entry (it does not cover all rheumatic disease patients with COVID-19 in the observed population) as well as the incorrect assignment of race/ethnicity by a describing physician [2–4]. As in states such as Poland, with a more homogeneous ethnic structure, reliable comparisons in this respect are not possible, the need for creation of international registers and for cooperation within their structures becomes evident. Among all patients in the National Institute of Geriatrics, Rheumatology and Rehabilitation hospitalized due to the COVID-19 infection during the “third wave” of the pandemic in Poland (March–May 2021), only about 2% had inflammatory rheumatic diseases among revealed comorbidities and no patients from this group died during the hospitalization. What is important, the presence of the RD had no essential impact on the course of infection, with other comorbidities – such as diabetes, chronic obstructive pulmonary disease (COPD) or coronary artery disease with chronic circulatory failure – playing a vital role in this respect. The COVID-19 pandemic also brought unintended opportunities associated with the diagnostic process undertaken during the infection. An example of such a situation is the discovery of aortic aneurysm lesions in hospitalized COVID-19 patients, as computed tomography (CT) scans of the chest were performed in the majority of this group [5]. These findings, associated with poorly controlled arterial pressure and the progressive atherosclerotic process, were mostly asymptomatic or scarcely symptomatic, and only the diagnostic pro-