tetano
Editor, Senior Moderator
Microbiol Spectr
. 2022 Mar 9;e0225221.
doi: 10.1128/spectrum.02252-21. Online ahead of print.
Vaccine-Induced Antibody Responses against SARS-CoV-2 Variants-Of-Concern Six Months after the BNT162b2 COVID-19 mRNA Vaccination
Pinja Jalkanen[SUP] 1 [/SUP], Pekka Kolehmainen[SUP] 1 [/SUP], Anu Haveri[SUP] 2 [/SUP], Moona Huttunen[SUP] 1 [/SUP], Larissa Laine[SUP] 2 [/SUP], Pamela Österlund[SUP] 2 [/SUP], Paula A Tähtinen[SUP] 3 [/SUP], Lauri Ivaska[SUP] 3 [/SUP], Sari Maljanen[SUP] 1 [/SUP], Arttu Reinholm[SUP] 1 [/SUP], Milja Belik[SUP] 1 [/SUP], Teemu Smura[SUP] 4 [/SUP], Hanni K Häkkinen[SUP] 5 [/SUP], Eeva Ortamo[SUP] 5 [/SUP], Anu Kantele[SUP] #[/SUP][SUP] 5 [/SUP], Ilkka Julkunen[SUP] #[/SUP][SUP] 1 6 [/SUP], Johanna Lempainen[SUP] #[/SUP][SUP] 3 6 7 [/SUP], Laura Kakkola[SUP] #[/SUP][SUP] 1 [/SUP]
Affiliations
Abstract
The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants has raised concern about increased transmissibility, infectivity, and immune evasion from a vaccine and infection-induced immune responses. Although COVID-19 mRNA vaccines have proven to be highly effective against severe COVID-19 disease, the decrease in vaccine efficacy against emerged Beta and Delta variants emphasizes the need for constant monitoring of new virus lineages and studies on the persistence of vaccine-induced neutralizing antibodies. To analyze the dynamics of COVID-19 mRNA vaccine-induced antibody responses, we followed 52 health care workers in Finland for 6 months after receiving two doses of BNT162b2 vaccine with a 3-week interval. We demonstrate that, although anti-S1 antibody levels decrease 2.3-fold compared to peak antibody levels, anti-SARS-CoV-2 antibodies persist for months after BNT162b2 vaccination. Variants D614G, Alpha, and Eta are neutralized by sera of 100% of vaccinees, whereas neutralization of Delta is 3.8-fold reduced and neutralization of Beta is 5.8-fold reduced compared to D614G. Despite this reduction, 85% of sera collected 6 months postvaccination neutralizes Delta variant. IMPORTANCE A decrease in vaccine efficacy against emerging SARS-CoV-2 variants has increased the importance of assessing the persistence of SARS-CoV-2 spike protein-specific antibodies and neutralizing antibodies. Our data show that after 6 months post two doses of BNT162b2 vaccine, antibody levels decrease yet remain detectable and capable of neutralizing emerging variants. By monitoring the vaccine-induced antibody responses, vaccination strategies and administration of booster doses can be optimized.
. 2022 Mar 9;e0225221.
doi: 10.1128/spectrum.02252-21. Online ahead of print.
Vaccine-Induced Antibody Responses against SARS-CoV-2 Variants-Of-Concern Six Months after the BNT162b2 COVID-19 mRNA Vaccination
Pinja Jalkanen[SUP] 1 [/SUP], Pekka Kolehmainen[SUP] 1 [/SUP], Anu Haveri[SUP] 2 [/SUP], Moona Huttunen[SUP] 1 [/SUP], Larissa Laine[SUP] 2 [/SUP], Pamela Österlund[SUP] 2 [/SUP], Paula A Tähtinen[SUP] 3 [/SUP], Lauri Ivaska[SUP] 3 [/SUP], Sari Maljanen[SUP] 1 [/SUP], Arttu Reinholm[SUP] 1 [/SUP], Milja Belik[SUP] 1 [/SUP], Teemu Smura[SUP] 4 [/SUP], Hanni K Häkkinen[SUP] 5 [/SUP], Eeva Ortamo[SUP] 5 [/SUP], Anu Kantele[SUP] #[/SUP][SUP] 5 [/SUP], Ilkka Julkunen[SUP] #[/SUP][SUP] 1 6 [/SUP], Johanna Lempainen[SUP] #[/SUP][SUP] 3 6 7 [/SUP], Laura Kakkola[SUP] #[/SUP][SUP] 1 [/SUP]
Affiliations
- PMID: 35262410
- DOI: 10.1128/spectrum.02252-21
Abstract
The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants has raised concern about increased transmissibility, infectivity, and immune evasion from a vaccine and infection-induced immune responses. Although COVID-19 mRNA vaccines have proven to be highly effective against severe COVID-19 disease, the decrease in vaccine efficacy against emerged Beta and Delta variants emphasizes the need for constant monitoring of new virus lineages and studies on the persistence of vaccine-induced neutralizing antibodies. To analyze the dynamics of COVID-19 mRNA vaccine-induced antibody responses, we followed 52 health care workers in Finland for 6 months after receiving two doses of BNT162b2 vaccine with a 3-week interval. We demonstrate that, although anti-S1 antibody levels decrease 2.3-fold compared to peak antibody levels, anti-SARS-CoV-2 antibodies persist for months after BNT162b2 vaccination. Variants D614G, Alpha, and Eta are neutralized by sera of 100% of vaccinees, whereas neutralization of Delta is 3.8-fold reduced and neutralization of Beta is 5.8-fold reduced compared to D614G. Despite this reduction, 85% of sera collected 6 months postvaccination neutralizes Delta variant. IMPORTANCE A decrease in vaccine efficacy against emerging SARS-CoV-2 variants has increased the importance of assessing the persistence of SARS-CoV-2 spike protein-specific antibodies and neutralizing antibodies. Our data show that after 6 months post two doses of BNT162b2 vaccine, antibody levels decrease yet remain detectable and capable of neutralizing emerging variants. By monitoring the vaccine-induced antibody responses, vaccination strategies and administration of booster doses can be optimized.