In Canada the Dr title is overly respected when, especially for a medical doctor (which is not a true research degree, but rather an high-level, overrated professional training), it is of very little value in being an authority figure in a field. Perhaps if you said she was a professor in a reputable university, and that she spent her whole career studying RNA vaccines, it would grant her some credibility. Her opinion on vaccine mixing is of equal value to the political opinion of an NHL player.