The SARS-CoV-2 (Covid) vaccinations are an untried and untested MRNA technology, which we have never before seen used in humans. No long-term safety trials have been completed yet for these injections and therefore it would be true to say that they are experimental.
In research of any kind it is vital to have both an experimental group and a control group. The experimental group receive the treatment (SARS CoV-2 vaccines in this case) the researcher is interested in measuring the effectiveness of. The control group does not receive the treatment.
The reason for this is so that the researchers can determine if the treatment has an impact on the measure of experiment (in this case, the reduction in serious infection as well as the incidence of adverse reactions in those given the SARS-CoV-2 vaccine). A control group serves as a baseline comparison to the experimental group, whereby the researchers can reliably compare the measured results of the treatment cohort with the control.
Failure to provide a strong control group may cause a study to be considered invalid, because it would not allow the researchers to eliminate or attribute effects that might have occurred within the experimental group as being due to the treatments or incidental occurrence.
The people originally allocated by the pharmaceutical companies to be part of a control group for the SARS-CoV-2 vaccines, have almost all been vaccinated now. This means that the official, long term control group for the SARS-CoV-2 vaccine research no longer exists. This is irresponsible and against best practice for scientific research and it means that neither the risks nor the benefits can be truthfully attributed to the vaccinations.