The new vaccine is called Bivalent which means it contains two messenger RNA (mRNA)

 Two Studies from Columbia and Harvard Reveal New Omicron Boosters Were Just as Ineffective as Previous Covid Shots – FDA Says Study Too Small to Come to Any Conclusions. 

The new vaccine is called Bivalent which means it contains two messenger RNA (mRNA) components of the coronavirus. Half of the vaccine targets the original strain, and the other half targets the BA.4 and BA.5 Omicron subvariant lineages.

These new COVID boosters were not tested on humans – only mice.

Now, two independent studies conducted by scientists from Columbia University in New York City and Harvard University found that the new boosters did not produce a better antibody response in humans against BA.5 than the first-generation vaccines, NBC reported.

They compared samples from 21 patients in the Columbia research and 18 people in the Harvard study who received the new boosters to people who received the old vaccine as their fourth shot.

https://www.thegatewaypundit.com/2022/10/two-studies-columbia-harvard-reveal-new-omicron-boosters-just-ineffective-previous-covid-shots-fda-says-study-small-come-conclusions