I think it is too late for that for the son. I encouraged him to have his wife get the treatment if she was in the transport vehicle since she is considered to be at risk since she would have been exposed.
I don’t think so at all. My ex-daughter-in-law is obese and got Delta in July, along with her non-obese husband and 2 kids (one of whom is my teenaged granddaughter). None of them were vaccinated. The parents were both hospitalized for 6 days but the kids were fine. My DIL was sent home on oxygen but she survived, as did her husband. It’s not a death sentence.