I had a no scalpel vasectomy. My wound took about 3 weeks for me to feel comfortable. I had doubts after 2 weeks, but it eventually got there. They don’t unnecessarily give out antibiotics here. It was a case of water to clean and keep it dry. I ended up using antiseptic cleaning fluid for the last week or so.
Here in the UK, they say 12 weeks minimum, and the test for all clear is after 16 weeks, but that’s probably a little safer and in these situations, I ain’t taking any gambles. Imagine knocking someone up 9 weeks after a vasectomy. Could be soul destroying.