Instagram founders Kevin Systrom and Mike Krieger launch Rt.live, an up-to-date tracker of how fast COVID-19 is spreading in each US state (Josh Constine/TechCrunch)

Josh Constine / TechCrunch:
Instagram founders Kevin Systrom and Mike Krieger launch Rt.live, an up-to-date tracker of how fast COVID-19 is spreading in each US state  —  Instagram founders Kevin Systrom and Mike Krieger have teamed up to launch their first product together since leaving the Facebook mothership.