How long after finishing taking an antibiotic can blood tests be done?

You can meet with opinions to wait at least a week or even a dozen or so days after the illness before performing laboratory tests. Nevertheless, the most competent person to give you an answer on the subject of blood tests seems to me to be a laboratory diagnostician or a doctor. You can use the teleadvice here: https://www.gdziepolek.pl/telekonsultacja I also attach a link to our article, which may be helpful: https://www.gdziepolek.pl/artykuly/jak-przygotowac-sie-do-badania-krwi