Called today and all the places called said it was a 3 week wait for the current booster. I called Costco and was told we could walk in and there may be a wait but they had enough vaccine and we would get in today. Went in around 1:40 pm and was out within 10 minutes. We, obviously, picked an opportune time!!! Costco does not require a Costco membership for the pharmacy. So far my arm does not hurt and have no reaction. The last shot it took 6 months for my arm to get back to normal. So far, so good!