Objections over long term safety are absolutely reasonable due to historical precedent (see the Polio vaccine) and because the litmus test of “peer-reviewed” research is the standard the parent I responded to set. There exists no “long term” research of mRNA vaccines from which to draw conclusions (another reason why the “peer-reviewed science” standard for truth is fundamentally flawed). I don’t think concerns over long-term danger is a strong argument (which is one reason I chose to be vaccinated) but it is absolutely reasonable.