Funnily enough i know some parents who just had a baby - they're big pro-vaxxers to the point that you can't see the baby unless you've been vaccinated. The baby is apparently crying continuously - the parents, including the father, who is a doctor, don't know why.

Well, he's the doctor, but that sounds backwards to me. Given that the infant is not threatened by COVID a this point in their life, wouldn't it be wise to indeed expose them to the virus that's floating around so they can build natural immunity?