COVID 19 and Hemoglobinopathies: Update of the Italian Experience

Background. Patients with pre-existent chronic morbidities are likely to be more severely affected by SARS-Cov2 infection. In Italy, the "Società Italiana Talassemie ed Emoglobinopatie" (SITE) has recently estimated the number of patients (Pts) with Hemoglobinopathies followed by Italian Specialized Centers (SITE Network). Five thousand Transfusion-dependent beta-thalassemia (TDT), 1900 Non-Transfusion-dependent beta-thalassemia (NTDT) and 2000 Sickle Cell Disease (SCD) were registered [1]. To verify the impact of SARS-CoV-2 infection on Pts with Hemoglobinopathies, we performed a specific survey by electronic Case Report Form (eCRF). Inclusion criteria included positive swab or serology in a patient with hemoglobinopathy and at least 15 days of follow-up from either the onset of symptoms or SARS-CoV2 positivity. The survey was approved by the Ethics Committee, and eCRF was shared with the Centers of Italian Hemoglobinopathies Network. Preliminary data updated to April 10, 2020, were published [2].

Results. As of July 31, 2020, 27 cases have been reported: 18 TDT, 4 NTDT, 5 SCD. 89% of the cases were in Northern Italy, where the rate of infection was much higher than the rest of the country, reflecting the national epidemiology. The mean age of thalassemia patients (TDT and NTDT) was 43±11 years, and 55% were male; the mean age of SCD patients was 33±15 years, and 40% was male. The likely source of infection has been detected in 63% (17/27) of cases: 11 had occupational exposure, 6 had a positive relative. Five patients were asymptomatic: for them, the SARS-CoV-2 infection was identified by positive swab for 1 patient and by positive level of IgG for 4. Twenty patients had associated comorbidities, 14 were splenectomized, and 3 had functional asplenia. Eleven patients were hospitalized, only one in high-intensity care unit. Three patients required more intensive ventilation support with continuous positive airway pressure (CPAP), one of these has a history of diffuse large B-cell lymphoma treated with chemotherapy in the previous year. Three other patients required support by oxygen. No Pts required intubation. Two Pts increased blood requirement. Only five received supposedly specific treatment for COVID-19: two hydroxychloroquine (HCQ), one HCQ plus ritonavir/darunavir, and one HCQ plus anakinra, one HCQ plus Tocilizumab plus Lopinavir/Ritonavir. The clinical course of hospitalized patients was 18±7 days. All patients recovered.

Conclusions. The prevalence of COVID-19 infection in Italian patients with Hemoglobinopathies result 0,3% while in general population the prevalence in Italy is 0,4% [3]. Considering that the thalassemia population is more strictly observed, we could postulate that the precautions suggested or self-applied by the Pts were effective. No death nor severe SARS with intubation, nor signs of cytokines storm, only one thromboembolic event was observed although most individuals had pre-existing complications. A single case with pulmonary hypertension has been described in detail [4]. In most individuals the infection has been pauci or asymptomatic and all recovered. This experience differs from what has been observed in Iran on a similar series with different severity and mortality and ask for a more in-depth comparison [5]. In conclusion, our data do not indicate increased severity of COVID-19 in Pts with Hemoglobinopathies followed in Specialized Centers.

Acknowledgment. We would like to thank ALT (Associazione per la Lotta alla Talassemia R.Vullo - Ferrara)..

References

1. http://www.site-italia.org/2020/covid-19.php. SITE communication. Accessed April 1, 2020

2. Motta I, Migone De Amicis M, Pinto VM, et al. SARS-CoV-2 infection in beta thalassemia: Preliminary data from the Italian experience. Am J Hematol. 2020;95(8): E198-E199.

3. https://www.epicentro.iss.it/coronavirus/sars-cov-2-dashboard, Accessed July 31, 2020

4. Pinto VM, Derchi GE, Bacigalupo L, Pontali E, Forni GL. COVID-19 in a Patient with β-Thalassemia Major and Severe Pulmonary Arterial Hypertension. Hemoglobin. 2020;44(3):218-220.

5. Karimi M, Haghpanah S, Azarkeivan A, et al. Prevalence and mortality in β-thalassaemias due to outbreak of novel coronavirus disease (COVID-19): the nationwide Iranian experience. Br J Haematol. 2020;190(3):e137-e140.