Phase I/II study of COVID-19 RNA vaccine BNT162b1 in adults
In March 2020, the World Health Organization (WHO) declared coronavirus disease 2019 (COVID-19), which is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) , a pandemic. With rapidly accumulating numbers of cases and deaths reported globally , a vaccine is urgently needed. Here we report the available safety, tolerability and immunogenicity data from an ongoing placebo-controlled, observer-blinded dose-escalation study (ClinicalTrials.gov identifier NCT04368728) among 45 healthy adults (18–55 years of age), who were randomized to receive 2 doses—separated by 21 days—of 10 μg, 30 μg or 100 μg of BNT162b1. BNT162b1 is a lipid-nanoparticle-formulated, nucleoside-modified mRNA vaccine that encodes the trimerized receptor-binding domain (RBD) of the spike glycoprotein of SARS-CoV-2. Local reactions and systemic events were dose-dependent, generally mild to moderate, and transient. A second vaccination with 100 μg was not administered because of the increased reactogenicity and a lack of meaningfully increased immunogenicity after a single dose compared with the 30-μg dose. RBD-binding IgG concentrations and SARS-CoV-2 neutralizing titres in sera increased with dose level and after a second dose. Geometric mean neutralizing titres reached 1.9–4.6-fold that of a panel of COVID-19 convalescent human sera, which were obtained at least 14 days after a positive SARS-CoV-2 PCR. These results support further evaluation of this mRNA vaccine candidate. 1 2
Mulligan, Mark J.; Lyke, Kirsten E.; Kitchin, Nicholas; Absalon, Judith; Gurtman, Alejandra; Lockhart, Stephen; Neuzil, Kathleen; Raabe, Vanessa; Bailey, Ruth; Swanson, Kena A.; Li, Ping; Koury, Kenneth; Kalina, Warren; Cooper, David; Fontes-Garfias, Camila; Shi, Pei Yong; Türeci, Özlem; Tompkins, Kristin R.; Walsh, Edward E.; Frenck, Robert; Falsey, Ann R.; Dormitzer, Philip R.; Gruber, William C.; Şahin, Uğur; and Jansen, Kathrin U., "Phase I/II study of COVID-19 RNA vaccine BNT162b1 in adults" (2020). Rochester Regional Health authored publications and proceedings. 83.