interface - How to design a UI for user to declare injuries?

I was discussing with a friend about a healthcare application he is working on and he tell me about a UI his team was working on.

Users' task

The application is used by independent/self-employed workers (in France) and should help them declare on which part and side an injury took place.

Goal

The interface should help prevent declaration errors. As his question was "should we display the body from front or back view?" as the teammates had different opinions on which side was right/left?

Question

Should he go for a mirror image or a 'shadow projection' ?