Once upon a time, in 2002, there was the SARS-CoV-1 virus, for which they developed a vaccine.
Animals given the vaccine developed a robust antibody response, which is what they wanted.
But when the animals were exposed to the live virus, they all died from the pathogenic priming effect, so they discarded the vaccine.
Fast forward to 2019 and the SARS-CoV-2 virus, in which vaccines were developed in a rush and released as experimental vaccines - and guess what essential step was skipped? Animal trials.

A Nobel prize winning virologist predicts mass deaths within 2 years among those vaxxed.

The UK recently released a report showing that most COVID deaths are among the vaccinated.

One of many reports on UK COVID deaths:

UK hospital data shocks the world: 80% of COVID deaths are among the vaccinated… COVID deaths up 3,000% after vaccine wave

(Note: Here is the link he posted - doesn’t look like a very authoritative source to me https://stuartbramhall.wordpress.com/2021/09/28/uk-hospital-data-shocks-the-world-80-of-covid-deaths-are-among-the-vaccinated-covid-deaths-up-3000-after-vaccine-wave/)