RE: CDC Oversells the ‘Bivalent’ Covid Shot23 Sep 2022 10:25
It's just not true that the bivalent vaxes have not been trialed. The bivalent mRNA-1273.214 was added to the ongoing Moderna trial which started in March
"Between February 18 and March 8, 2022 (part F, cohort 2), and between March 8 and March 23, 2022 (part G), 819 participants were enrolled who had previously received the primary series of 100-µg mRNA-1273 and a first booster dose of 50-µg mRNA-1273, at least 3 months before enrollment (Figure 1). Of these, 197 of the COVE participants (44.8%) and 243 of the U.S. EUA participants (55.2%) were assigned to receive second booster doses of 50-µg mRNA-1273.214 (440 participants), and 264 participants (69.7%) and 115 participants (30.3%), respectively, were assigned to receive 50-µg mRNA-1273 (379 participants). A total of 437 participants (53.7%) in the 50-µg mRNA-1273.214 group and 377 participants (46.3%) in the 50-µg mRNA-1273 group received second boosters. "
" the bivalent omicron-containing mRNA-1273.214 vaccine also elicited higher neutralizing antibody responses than mRNA-1273 against omicron BA.4/5 subvariants and higher spike-binding antibody responses against alpha, beta, gamma, delta, and omicron variants regardless of previous SARS-CoV-2 infection. The longevity of antibody responses is also important to future vaccination strategies. Enhanced durability of the antibody responses at 6 months after immunization was observed for mRNA-1273.211,20 and monitoring of the persistence of mRNA-1273.214 antibody responses continues in this ongoing clinical study. "