“EarlyFlatten” is a digital platform to perform a site-specifically strategic design program for early sensing and flattening the wave of Covid-19 spreading in public, commercial, and industrial buildings by wastewater surveillance.

Early Flatten is the modified SEIR (Susceptible, Exposed, Infectious, Recovered) model which integrates the sewage surveillance of SARS-CoV-2 as the main strategy.

Wastewater surveillance (or sewage surveillance) of COVID-19 spreading relies on detecting RNA fragments of SARs-CoV-2 excreted by COVID-19 infected persons to wastewater collection system. If greater than 0.38 infected persons in 100 population excrete into a toilet, sufficient RNA fragments will be detected in wastewater, which is used as an early indicator of COVID-19 infection in community at the accuracy of 99.15±13.15 % and with the early warning capability of 8 to 22 days prior to the actual COVID-19 outbreaks.

Just monitoring one wastewater sample per community can substitute individual ATK testing for the entire community.

The quantity of RNA fragments can be used to estimate the number of infected persons.

EarlyFlatten’s strategy is to use wastewater surveillance to replace individual ATK or RT-qPCR testing in a public, commercial, and industrial buildings, which will not only eliminate individual expense on ATK testing but also detect the sign of infection much earlier than the individual testing (8 to 22 days earlier).