1) I had my booster 2 weeks ago and still am having side effects. I had 2 days of feeling like shit and having my physical output at maybe 20%, slowly recovering but after 2 weeks still around 75% or so. Not sure if it will improve come the new competition season. Same issues were reported with teammates. (I play a sport competitively, 2 days before the vaccine I did a 4.5 hour hard intensive training day, was ok and recovered fine. Just yesterday I had a training match and after 1 hour or so was feeling the lack of strength and difficulty breathing). I am not high risk for covid related issues. Right now, the booster has been quite an issue for me, and if I don't go back to 100% soon, my next year tournaments/ranking is compromised.
2) My kid is at an age they are pushing for vaccine for his age group. His risk based on my country data is pretty much zero (4 severe cases, 3 had co-mobilities that a normal cold would get them in the hospital, and one apparent healthy kid had severe issues but recovered). Risks from the vaccine for this age group are bigger than covid for him. I am against vaccinating him. (mother isn't and he will be)
I am not anti-vaxx (I even got my booster) but if they told me I could be 2+ weeks at reduced physical capacity befora having the booster, I wouldn't have done it.