Agree entirely with @dfisman.bsky.social
Current technologies allow sampling indoor air on a continuous real-time basis to allow measurement of viral loads in air duct systems of complex buildings. Quite similar to wastewater testing that can also be applied to complex buildings.
We could/should be exploring air surveillance as a natural counterpart to wastewater surveillance. Environmental pathogen burden is a great surrogate for risk and gets around both logistic challenges and issues of representativeness that accompany testing individual people

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