“…One of the studies considered variables consequent to the pandemic, such as perceived present and future infection risk, loss of income, and financial worry [51], while another research conducted in Italy by Invito et al [52] took into account psychological distress and viral contagion beliefs, and added epidemiological characteristics, such as COVID-19 diagnosis, sex status and number of COVID-19 infected and deaths according to the participant's region. Symptom interaction network theory research has spurred several papers seeking to explore the interconnections of the most recurrent physical and psychological symptoms in certain chronic conditions, such as cancer [53], HIV [54], schizophrenia [55], stroke [56], chronic pain [57] chronic bowel disease [58], multiple sclerosis [59], arterial hypertension [7], obesity [60], and COVID-19 [61].…”