There are a ton f sources, if people choose to read books and independent studies. I am not going to go searching for a link on google to share. Twenty years ago my son was vaccine injured, I studied vaccines like my hair was on fire.

You can start with Thinktwice.com

Start digging you'll find stuff.. I spent years lecturing and educating people on vaccines, This was BEFORE social l media and everyone having a mini computer in their back pocket.

Unfortunately the internet is loaded with garbage now but go do some studying about vaccine history. The polio vaccine was actually causing polio and then discovered to be causing cancer due to SV40, a simian virus found in the vax. Monkey kidneys are used in the vaccine to cultivate the virus. Also to make it look like polio was being eradicated,they took polo symptoms and put them in the meningitis category, making the number look lower. Much like they are fucking with the numbers to day

Polio was most likely due to the fact that Americans started canning goods. Heavy metals were being ingested- body rejects toxins by creating exosomes. If people only knew the truth about viruses, they wouldn't be scared at all. Here is a good one. https://www.amazon.com/Virus-Vaccine-Contaminated-Cancers-Government/dp/0312342721/ref=sr_1_4?crid=3G5EXGFI3QIRW&dchild=1&keywords=monkey+virus+book&qid=1635091897&sprefix=monkey+virus%2Caps%2C113&sr=8-4