One infection doesnt mean a lab is done. Infection can be due to bad pinning techniques, re-use of barrels/pins, not using an alcohol swab, etc. Ive known a person to use the same barrel for a couple weeks. Guess what happened in the end? Yeah, infection. Now if a few people got an infection from the same batch a lab put out then thats a clear indicator that they arent using proper sterilization procedures. And ultimately that will end a lab. Not one infection as there are a few factors of how it could have occurred based around an individuals