We would need to know its resonant frequency so we don’t harm healthy cells. The wave causing physicality is around 0.3 micrometers in wavelength. It is on the EM spectrum, but I don’t know if we can cause destructive interference without the aid of a black hole. That is where the decoherence wave is coming from. This would be the biggest breakthrough in science ..ever.
Perhaps a coherent ultraviolet wave would do the trick. It would need set to the exact wavelength of the quantum/classical boundary. We know viruses are on the upper edge of this boundary because they do not display fringes in the double slit experiment. Viruses are a little larger than 0.3 micrometers. It takes light a femtosecond to cross this distance, so we are close to the frequency and wavelength necessary to cancel the decoherence wave out. If coherent waves don’t do it, we may need to figure out how to redirect other decoherence waves at the virus.
We would find the exact resonant frequency at some stage of the virus that is unique. The resonant is only to locate the objects that need the decoherence wave canceled out. We can disassemble the virus while it is in matter wave form.
The goal is to make it a pile of unbonded atoms. If swapping it to matter waves doesn't automatically do it, we will need to find the second punch to accomplish it. The resonant frequency might be enough to shake it apart.