FOUR thing we must do: 1. Test widely. That means every person in the country with pneumonia, every sick health care worker, every person in nursing homes, all contacts with symptoms (and maybe some without), all patients in clusters that could be #COVID19, and more.

2. Isolate all infected people. In hospitals-safely without any infections of health care workers, patients. In nursing homes, ground zero for this pandemic in U.S. In patient homes - if this can be done safely, or in hotels, dorms, or other facilities that are safe & attractive

3. Contact tracing is core public health action. This is a public health emergency; public health must guide us forward. Contact tracing requires army of skilled, sensitive, supervised staff to reach out to patients and help them identify contacts so these contacts can be warned.

3. Quarantine contacts. Provide support and services so that they, their families, and their communities will be protected. Ensure they don't expose others & are linked to social & medical services they need, immediately tested & isolated if they become ill. #BoxItIn #BoxCovidIn

oops. That's 4, not a second 3.