New York and New Jersey join a growing list of states with contact-tracing apps residents can use.

Residents of New York and some surrounding states can now use their smartphones to track whether they have come close to someone with the coronavirus.

from World News https://www.nytimes.com/2020/10/01/world/new-york-and-new-jersey-join-a-growing-list-of-states-with-contact-tracing-apps-residents-can-use.html