She's not addressing anyone, she is pandering to their confirmation bias.
She literally gave a non-answer by just fucking saying "questions need addressed". Cmon Jill, what questions? Care to address them for us given your medical background? No?
That is exactly what she is doing actually, she first acknowledges how doctors in the past were concerned over the level of mercury in vaccines, since then we have been able to remove thimerosal from child vaccinations, thus making vaccinations safer. She goes on to say that we have been able to answer these past concerns about vaccines, but she is unsure that we have been able to answer all of them.
That is not a problem.. that is a doctor saying "hey, I'm listening" which is what a scientist is supposed to do, accept that people have questions, listen to them.. and then answer them. Is she answering their questions in this specific statement? no, she is acknowledging that they exist. That is not something that should be condemned