[sharpercoder]

Can ultra-high resolution, ultra-high framerate and ultra-high zoom camera's measure exhalation of virii particles out of a humans mouth?

[pvg]

Most viruses are smaller than visible light wavelengths. The biggest are about a wavelength or two.

Edit: some sizes here, including SARS-CoV-2

https://www.news-medical.net/health/The-Size-of-SARS-CoV-2-C...

[praptak]

Resolution of plain optics only goes up to the diffraction limit, which is not enough to see a virus.

Then there are super-resolution techniques which can go beyond that, but I don't think any of them could be adapted to scan the vicinity of the coughing human in real time.

[fulafel]

The virus is quite small and would have to be in some unconventional state to show up optically (could make an interesting what-if xkcd).