One, that's a loaded statement. No one said they were anti-vaccine. They're against forced experimentation on unwilling victims. Excuses such that this virus requires forced experimentation were voided in the Nuremberg Code in 1947 which clearly spells out that forced experimentation, which the Nazis performed on people they deemed less than human, is unacceptable.
Two, it's false to assume the reduction in cases was due to the experimentation. Mankind flattened the curve in the Spring of 2020 and built up natural immunity as we have done with EVERY coronavirus for thousands of years. For example, the data is available showing that those infected with SARS in 2003 have the antibodies for COVID-19.
Hard to find a more perfect example of Covid-vax deniers' misrepresentations than that statement.
What government in the world has forced Covid vaccinations on its citizens?