Robuta

https://www.medicines.org.uk/emc/ingredient/1205
Medicines containing the active ingredient diphtheria, tetanus and pertussis vaccine
active ingredientpertussis vaccinemedicinescontainingdiphtheria
https://www.doctorswithoutborders.org/latest/us-government-concerns-over-key-vaccine-ingredient-are-not-based-science
Reducing the global supply of vaccines that contain the preservative thimerosal means fewer children in humanitarian and conflict settings would be protected
us governmentvaccine ingredientconcernskeybased