Fake it till you make it!
I claim the following in the field of medicine,

A laser prism scanner which measures the blood nerve in the eye ball (via laser microscope), tongue or other area close to blood stream. In combination with Raman or laser acoustic, laser induced breakdown spectroscopy you can analysis the blood stream, skin cells or blood.

Using laser induced forward transfer you could emit a droplet and then transfer it into to the nerve. Virus probably doesn't need much help.

Another method I see is that you drill a tiny hole in the skin. Like 30 micron wide or smaller. I would simply burn it with laser and hope person doesn't notice that much.

You then emit a droplet using lift and pump it in the vein 😀 or you emit the droplet in the nose using lift.

Could work 🤔,  I think approach should be easy for people having ordinary skill in the art of laser prism scanning. Fake it till you make it. Note that viral particles are really tiny. Also some bacteria, so droplet doesn't need to be large.

I couldn't resist;