There was a reason they stopped using the original, toxic formula.  Now pediatricians and vaccinologists (whatever in the hell THAT is) want to bring it back.  ** Is a vaccinologist someone who is supposed to know about vaccines?  Because if that's what that word means, then those people should also know how toxic ALL vaccines are and should find a different line of work. 

https://www.nvic.org/NVIC-Vaccine-News/September-2018/the-pertussis-vaccine-blame-game.aspx

This is horrifying news.  But you can bet it will be back.