Shidduchim and Vaccination

 http://www.5tjt.com/are-shadchanim-who-tell-people-not-to-get-the-vaccine-in-violation-of-the-torah-prohibition-of-lifnei-iver/

Now let’s get back to our question: Are shadchanim who tell people not to get the vaccine in violation of the Torah prohibition of lifnei iver? The answer is not all that simple. There is a difference between the first form of lifnei iver, in regard to halachah, and the second form of lifnei iver, in regard to bad advice. The difference is discussed in the footnotes to the Mossad HaRav Kook Ritva on Yevamos 342 (column 1) written by Rabbi Refoel Aharon Yoffen, zt’l.