I agree with at least decriminalizing prostitution. If it would be legalized and regulated like any profession, I suppose that would reduce the danger for both worker and client.
What system would you prefer? I'm thinking more of a brothel setup but it would be like a regular office with CCTVs everywhere and guards. Clients would have to be escorted to the door by the worker after things are done so workers can complain if anything wrong was done to them. For added precaution there would be an emergency button in every room so the worker can call on the guards if things go badly.
Since the workers would be regularly tested and would probably be on PrEP, they should also be asking customers for their records before allowing them to avail service.
If you make anything illegal, then the criminals and the organized cartels will benefit. If prostitution is legalized, then the trafficking of minor children will cease, and the spread of sexually transmitted diseases such as HIV and syphilis can be prevented.