officers […] stating that they ‘didn’t want to risk getting hepatitis/AIDS’ as justification for declining to provide lifesaving medical intervention.

Motherfucker, if you’re first aid/CPR trained, you are supposed to have appropriate PPE with or near you while on your job that will see you encounter such situations. If you don’t, that’s negligence on your part, and if you’re just choosing not to use it so you don’t have to get involved, you need to be taken off that job.