I don't think that is possible in situations that are suitable for SARS-CoV2 transmissions. The most extreme example is probably the meat processing plants, it

I don't think that is possible in situations that are suitable for SARS-CoV2 transmissions. The most extreme example is probably the meat processing plants, it spread like crazy in those conditions. Another example is the choir practices that also infected a lot of the participants. Anything that happens under the conditions suitable for superspreading events probably can't rely on any half-measures.