I am not against vaccines and understand the importance of them.
After looking through all of the ingredients in most vaccines, I can’t help but wonder if these are all necessary?
Some vaccines contain ingredients such as aluminum, formaldehyde, chick embryo, bovine extract, calf serum, thimerosal, etc.
https://www.cdc.gov/vaccines/pubs/pinkbook/downloads/appendices/b/excipient-table-2.pdf

I know that each individual vaccine is tested by itself, but how extensive is the research into combining many of the vaccines together or even shortly spaced apart?