The first article concluded that the booster did have an effect.Mothra said:
The Harvard article certainly supports my statement:
"The results of this study, reported in the journal Cell, indicate that traditional dosing regimens of COVID-19 vaccines available in the United States do not produce antibodies capable of recognizing and neutralizing the Omicron variant."
The second article calls into question whether the booster has any effect and concluded it does not.
"We detected very little neutralization of the Omicron variant pseudovirus when we used samples taken from people who were recently vaccinated with two doses of mRNA vaccine or one dose of Johnson & Johnson," says Balazs. "But individuals who received three doses of mRNA vaccine had very significant neutralization against the Omicron variant."
Did you read the whole article?
Of course, this is also a lab based study that, according to the article, looked at antibody response. It did not mention any other parts of the immune system.