Anyone remember the story of the quarantined mom who wanted so desperately to see her daughter and son-in-law? Once she got the Covid vaccinations she decided to visit her kids and she also took gifts. They met her at the door and thanked her for the gifts, then explained they could not let her in because she would make them infertile.

[henryford.com]

Let's use my logic for a moment. You are in the checkout at a grocery store and have no idea that the person in front of you has been vaccinated. Ditto! Instantly infertile. Maybe you have a friend or family member that you go out with who simply will not tell you they were vaccinated.