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1.
J Med Virol ; 93(3): 1739-1742, 2021 03.
Article in English | MEDLINE | ID: covidwho-1206811

ABSTRACT

Here we present results from a survey on anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) seroprevalence in healthy blood donors from a low incidence coronavirus disease 2019 area (Apulia region, South Eastern Italy). Among 904 subjects tested, only in nine cases (0.99%) antibodies against SARS-CoV-2 were demonstrated. All the nine seropositive patients were negative for the research of viral RNA by reverse transcription polymerase chain reaction in nasopharyngeal swabs. These data, along with those recently reported from other countries, clearly show that we are very far from herd immunity and that the containment measures are at the moment the only realistic instrument we have to slow the spread of the pandemic.


Subject(s)
COVID-19/immunology , Immunity, Herd/immunology , SARS-CoV-2/immunology , Adolescent , Adult , Aged , Antibodies, Viral/immunology , Blood Donors , Female , Humans , Italy , Male , Middle Aged , Pandemics/prevention & control , RNA, Viral/immunology , Young Adult
2.
Acta Haematol ; 144(5): 580-584, 2021.
Article in English | MEDLINE | ID: covidwho-1194384

ABSTRACT

Recently, a significant cluster of pneumonia caused by a novel betacoronavirus (severe acute respiratory syndrome coronavirus 2, SARS-CoV-2) was described initially in China and then spread throughout the world. Like other coronaviridae, the viral transmission occurs mainly through droplets. In addition, the virus has been detected in different clinical specimens, suggesting a potential transmission by other routes, including blood transfusion. However, the potential risk of transmission of SARS-CoV-2 via blood products is still unclear. The aim of our study was to investigate the prevalence of antibodies against SARS-CoV-2 among blood donors from South-Eastern Italy. Moreover, in the seropositive donors, we searched for the presence of the virus in nasopharyngeal swabs and in plasma samples. Overall, 1,797 blood donors from the Apulia region were tested for anti-SARS-CoV-2 antibodies, using a commercially available assay. Only 18/1,797 donors (1.0%) tested positive for anti-SARS-CoV-2 antibodies; in none of them SARS-CoV-2 viral RNA was detected in nasopharyngeal swabs and in plasma samples. Our results indicate that most of the blood donors in Apulia remained uninfected during this wave of the pandemic; further, none had detectable virus both in nasopharyngeal swabs and in blood samples. The risk to carry and transmit the virus by healthy and asymptomatic blood donors is probably very low.


Subject(s)
Antibodies, Viral/blood , Blood Donors , COVID-19/pathology , SARS-CoV-2/immunology , Adolescent , Adult , Aged , COVID-19/virology , Female , Humans , Italy , Male , Middle Aged , Nasopharynx/virology , RNA, Viral/analysis , RNA, Viral/metabolism , SARS-CoV-2/genetics , SARS-CoV-2/isolation & purification , Viral Load , Young Adult
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