Detailed Instructions: In this task you are given a Chinese paragraph related to a criminal case, your job is to give an answer of what the criminal charge is. Take note a) if there are multiple charges only one needs to be outputted b) the criminal charge should be in Chinese. 
Problem:社旗县人民检察院指控：2010年以来，被告人宋某在未取得执业医师资格证书和《医疗机构执业许可证》的情况下擅自在社旗县赊店镇建设北路开设“亿康诊所”非法进行诊疗活动，于2013年4月23日、2014年3月28日两次被社旗县卫生局执法人员行政处罚后仍继续××，于2015年9月18日再次被执法人员发现。
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
非法行医