Really the best option on a lot of this is a sense of humour - accept that all along the people of the world have been lab rats to some extent and that is likely to continue. Outcome somewhat TBD.
It helps to try and get accurate information and question all that can be found. Currently there is a fair amount of silence about what the outcome of the current vaccination program will be as far as the general population is concerned. Or for that matter the people who are vaccinated. Even the effectiveness of each type of vaccine. I assume supplies of each one will continue. 13 million people is a lot larger than any trial. Then they start on the rest.
One good thing is that vaccines are generally safer than drugs that are developed but there is risk associated with all treatments. Many drugs have side effects and all vaccinations may cause problems for some people but it would appear to be rather rare. Live vaccines have been used before as have the newer artificial ones that can't survive on their own. The flu jab is a weakened virus. The oxford one is a modified type that doesn't infect humans to any noticeable extent. They all need to get the immune system active so there may be side effects that people notice just as some do in the case of the flu jab. Aching arms are common with all jabs. Something I don't get. Some do.