No, science is absolutely NOT subjective. That’s the entire point of the scientific method. Yes, science evolves over time, but that doesn’t mean it’s subjective. Scientific theories are based on the best-reviewed evidence and are peer-reviewed extensively before they’re able to even be called theories. The entire point of the scientific method is that scientists act as a check for one another. Your job is to try to debunk the established science. If you are unable to do so, it means the science is sound. It’s literally the opposite of subjective. If the scientific method isn’t objective, then objectivity doesn’t exist.
The science of vaccines is not a guess, they know exactly what vaccines do. The reason their can be side effects is that human physiology is a little bit different in every individual. Some people may have reactions because they have allergies they don’t know about, or undiagnosed health problems that cause complications. It’s not that the vaccines are unpredictable, it’s that the people they’re being put in are. That’s mostly caused by human error, not by the vaccines being unsafe.
Your information isn’t wrong because it goes against what we’re told to believe. It’s wrong because it goes against establish, exhaustively-tested science with absolutely no evidence to back it up. I really feel like you don’t understand how science works. Maybe you should go read up on the scientific method.