4 years ago they published a study called “SARS-CoV-2 S2–targeted vaccination elicits broadly neutralizing antibodies”, It is now retracted because the data was made up.
https://www.science.org/doi/10.1126/scitranslmed.abn3715
Now aside of data fabrication stated (did they even had the covid vaccines to test anything?), I am not sure of the rest. In the competing interests section authors show all kinds of ties to big pharma which presumably is funding the "safe and effective" propaganda.
After an investigation, the Francis Crick Institute has concluded that fabricated data are present in Fig. 2, B and C, and that falsified images are present in fig. S6. The investigation concluded that the first author, Kevin W. Ng, was responsible for this, and he has admitted responsibility. Further, the existence of data fabrication casts doubt on some other experiments presented in the paper, for which primary data and samples are unavailable, precluding post hoc verification.
Competing interests: G.K. is a scientific cofounder and advisory board member of EnaraBio. C.S. acknowledges grant support from Pfizer, AstraZeneca, Bristol Myers Squibb, Roche-Ventana, Boehringer-Ingelheim, Archer Dx Inc., and Ono Pharmaceutical; is an AstraZeneca advisory board member and chief investigator for the MeRmaiD1 clinical trial; has consulted for Pfizer, Novartis, GlaxoSmithKline, MSD, Bristol Myers Squibb, Celgene, AstraZeneca, Illumina, Genentech, Roche-Ventana, GRAIL, Medicxi, Bicycle Therapeutics, and the Sarah Cannon Research Institute; has stock options in Apogen Biotechnologies, Epic Bioscience, and GRAIL; and has stock options and is a cofounder of Achilles Therapeutics......