Which air cleaners work best to remove aerosols that contain viruses?

Air cleaners (sometimes also called air purifiers or scrubbers) have been used for decades to filter out particles in the air from our homes, offices and laboratories.

Which air cleaners work best to remove aerosols that contain viruses?
Air cleaners (sometimes also called air purifiers or scrubbers) have been used for decades to filter out particles in the air from our homes, offices and laboratories.