We recommend that America adopt a multilayered air protection and mitigation strategy to
provide safe fresh indoor air across the 16 designated critical infrastructures. Coupled with
traditional public health guidance including testing, contact tracing, social distancing, and
isolation of people with known disease or exposure, we further recommend a focus on engineering
solutions and administrative controls. These controls, applied in a multilayered and redundant
model, at-scale, could provide the public confidence to allow America to fully reopen the economy
and sustain our critical infrastructures. Together with personal protective equipment for our most
vulnerable populations, we can sustain our country economically while protecting public health
and those most vulnerable to this or future diseases.