This very information is only revealed to HLC members, standard elders don't know it neither. HLC received a special guideline a few months ago regarding vaccines which answers this question. They will only mention this "aborted fetus" concerns if you ask them directly. No, they won't include this in the congregation announcements for all to hear, this information is secret.
If you have any HLC member nearby, test this: ask them whether should we take this ingredient issue into consideration or not?
Their answer is already ready. They can "neither-admit-nor-deny" this guideline and will tell "you are to decide based on your conscience" ... but hey, in fact you can't.