tetano
Editor, Senior Moderator
J Clin Virol
. 2021 Dec 14;146:105057.
doi: 10.1016/j.jcv.2021.105057. Online ahead of print.
Evaluation of neutralizing antibodies after vaccine BNT162b2: Preliminary data
Maria Teresa Vietri[SUP] 1 [/SUP], Luisa Albanese[SUP] 2 [/SUP], Luana Passariello[SUP] 3 [/SUP], Giovanna D'Elia[SUP] 4 [/SUP], Gemma Caliendo[SUP] 5 [/SUP], Anna Maria Molinari[SUP] 6 [/SUP], Italo Francesco Angelillo[SUP] 7 [/SUP]
Affiliations
Abstract
It is well-known that the Coronavirus Disease 2019, which is caused by the beta-coronavirus severe acute respiratory syndrome (SARS-CoV-2), emerged in December 2019 followed by an outbreak first reported in Wuhan, China. Thus far, vaccination appears to be the only way to bring the pandemic to an end. In the present study, immunogenicity data was evaluated using LIAISON® SARS-CoV-2 TrimericS IgG assay (DiaSorin S.p.A) among a sample of 52 vaccinated healthcare workers, five of whom were previously infected with SARS-CoV-2 and 47 who were seronegative, over a time span of ≤90 days following the second dose of the BNT162b2 mRNA vaccine. The test detects antibodies against the Trimeric complex (S1, S2 and receptor binding domain). The overall mean value of the serum levels of IgG antibodies to SARS-CoV-2 30 days following the second dose of the vaccine was 1,901.8 binding arbitrary unit (BAU)/ml, after 60 days the mean value declined to 1,244.9 BAU/ml. The antibody levels then reached a plateau, as confirmed by the antibody test carried out 90 days following the second dose, which revealed a mean value of 1,032.4 BAU/ml (P<0.0001). A higher level was observed at all three times in male subjects compared with female subjects, and in younger male participants compared with female participants, although these differences did not reach a statistically significant level. Similarly, no significant difference was found in antibody values at different times according to age. After the second dose of the vaccine, two subjects were infected with SARS-CoV-2, and an increase in antibody values in the third assay was observed in both individuals.
Keywords: Humoral immune response; Immunisation safety; Neutralizing antibodies; SARS-CoV-2; Surveillance; Vaccination.
. 2021 Dec 14;146:105057.
doi: 10.1016/j.jcv.2021.105057. Online ahead of print.
Evaluation of neutralizing antibodies after vaccine BNT162b2: Preliminary data
Maria Teresa Vietri[SUP] 1 [/SUP], Luisa Albanese[SUP] 2 [/SUP], Luana Passariello[SUP] 3 [/SUP], Giovanna D'Elia[SUP] 4 [/SUP], Gemma Caliendo[SUP] 5 [/SUP], Anna Maria Molinari[SUP] 6 [/SUP], Italo Francesco Angelillo[SUP] 7 [/SUP]
Affiliations
- PMID: 34923323
- DOI: 10.1016/j.jcv.2021.105057
Abstract
It is well-known that the Coronavirus Disease 2019, which is caused by the beta-coronavirus severe acute respiratory syndrome (SARS-CoV-2), emerged in December 2019 followed by an outbreak first reported in Wuhan, China. Thus far, vaccination appears to be the only way to bring the pandemic to an end. In the present study, immunogenicity data was evaluated using LIAISON® SARS-CoV-2 TrimericS IgG assay (DiaSorin S.p.A) among a sample of 52 vaccinated healthcare workers, five of whom were previously infected with SARS-CoV-2 and 47 who were seronegative, over a time span of ≤90 days following the second dose of the BNT162b2 mRNA vaccine. The test detects antibodies against the Trimeric complex (S1, S2 and receptor binding domain). The overall mean value of the serum levels of IgG antibodies to SARS-CoV-2 30 days following the second dose of the vaccine was 1,901.8 binding arbitrary unit (BAU)/ml, after 60 days the mean value declined to 1,244.9 BAU/ml. The antibody levels then reached a plateau, as confirmed by the antibody test carried out 90 days following the second dose, which revealed a mean value of 1,032.4 BAU/ml (P<0.0001). A higher level was observed at all three times in male subjects compared with female subjects, and in younger male participants compared with female participants, although these differences did not reach a statistically significant level. Similarly, no significant difference was found in antibody values at different times according to age. After the second dose of the vaccine, two subjects were infected with SARS-CoV-2, and an increase in antibody values in the third assay was observed in both individuals.
Keywords: Humoral immune response; Immunisation safety; Neutralizing antibodies; SARS-CoV-2; Surveillance; Vaccination.