The CDC has stated there is no data to prove that the vaccinated have a lesser chance of contracting or spreading COVID-19 than the unvaccinated. The vaccine MAY reduce the severity of the effects of COVID-19 in some people. It may have no effect at all. It may also cause dangerous side effects, or cause a person to develop other potentially life-threatening health conditions. And there IS data to support that. 

To be clear, I am not anti-vaccination. But until there is enough time to complete the required trials, and analyze the results, I am strongly against any mandate for the administration of a medication that could potentially kill someone. Without the data from a full clinical trial, "informed consent" is impossible to achieve.