Prevalence of SARS-CoV-2 infection and dynamics of antibodies response among previously undiagnosed healthcare workers in a university hospital: A prospective cohort study

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) immunoglobulins using chemiluminescence immunoassay and its correlation with neutralizing antibodies

“…Here, we evaluated the correlation between Ortho Clinical assay and neutralizing antibodies to set cut-off values of this assay to predict the level of antibody neutralization. Interestingly, we have demonstrated a correlation of Ortho Clinical IgG/total Ig against spike-1 of SARS-CoV-2 virus assay with the neutralizing assay in agreement with other studies using anti-spike protein assays ( Šimánek et al., 2021 ; Salazar et al., 2020 ; Suhandynata et al., 2021 ; Musa et al., 2021 ). Subsequently, we assessed the ability of our serology assay to predict the presence of neutralizing antibodies and to establish a high titer of 1:160 using ROC curves.…”

High Seroprevalence Against SARS-CoV-2 Among Faculty of Medicine and Health Sciences Personnel and Students of the University of Alcalá, Spain: Contributing Factors

“…Our results concur well with the 15.8 and 19.9% of prevalence of SARS-CoV-2 infection among healthcare workers founded in Kasr Al-Aini University Hospital, Cairo University, and Hospital Universitario de Fuenlabrada, respectively. 24 , 25 Reports from various countries show different seroprevalence of SARS-CoV2 patterns among healthcare workers (HCWs), with an 8.7% in the meta-analysis by Galanis et al, being higher in studies conducted in North America (12.7%) compared to those in Europe (8.5%), Africa (8.2%) and Asia (4%). 26 …”

Impact of COVID-19 on environmental services workers in healthcare settings: a scoping review

“…A further 1357 articles were removed after title and abstract screening and 21 articles were removed after review of full-texts. Finally, 24 articles were included in the scoping review [ [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] ]. The characteristics and salient findings of the included studies are summarised in Table 1 , Table 2 , Table 3 , grouped broadly as SARS-CoV-2 seropositivity studies, outbreak investigations and studies on mental health.…”

“…This was not observed for other occupations in the academic medical health system. Shepard, 2021 [ 25 ] United States Retrospective analysis Environmental services workers (56.12% females, average age 43.18 years), n=335 In an academic medical centre, there was a significantly greater prevalence of COVID-19 rt-PCR test positivity among environmental services workers (5.96%) compared to clinicians (1.93%; P<0.0001) and nurses (1.46%; P<0.0001). Shields, 2020 [ 26 ] United Kingdom Cross-sectional study Housekeeping staff, n=29 In a large hospital trust, the seroprevalence of SARS-CoV-2 antibodies was highest among housekeeping staff (34.5%, 10 out of 29 tested positive), compared to other asymptomatic healthcare workers.…”

“…There were six studies from the United States [ 10 , 12 , 19 , 24 , 25 , 31 ], six studies from India [ 16 , 18 , 20 , 27 , 29 , 32 ], two studies from the United Kingdom [ 17 , 26 ], two from Egypt [ 21 , 30 ], one each from Brazil [ 22 ], Chile [ 28 ], Ethiopia [ 33 ], Iran [ 15 ], Mexico [ 14 ], Qatar [ 11 ], Saudi Arabia [ 13 ] and Turkey [ 23 ].…”