I was reading your covid response thread. Interesting  

Here are the facts, Obsy

I was boosted, with moderna - I had slight headache and fatigue for a day ... the next day it was more mild

My friend, who is younger, who only received two doses of Pfizer, had a sore throat, cough, and felt off for 4 days.

So, let's dig deep down into the science of the booster shot.

Perhaps, I do love science and math - I was an EMT growing up for quite a few years and studied biomedical engineering in college (for 3 years, before I switched degrees). So, i do have a fascination about being able to measure things...

They can measure the vaccine effectiveness of a vaccine by measuring the neutralizing antibodies produced once a person gets covid. In other words, they can measure how well the body responded to a viral infection, after the fact, by looking to see the defenses the body put up.

What they found is that after people got the third Moderna shot, their neutralizing antibodies, created by the body as a result of the vaccine, went up 37 fold. This also correlated to far fewer symptoms.

So, the science is there. The data is there .... 

The data also clearly shows that the death rate of non-vaccinated is 10x higher (if not more). These are facts, not fiction. 

So, hopefully that answers your question about scientific proof that vaccines do work to prevent severe illness and death.

Here is yet another graph that shows how effective vaccines are in preventing infection