There's growing evidence that children can spread the coronavirus

The more we learn about kids and the coronavirus, the riskier reopening schools for in-person learning appears to be, at least in areas with high caseloads. There have already been many reports about the virus spreading through schools and summer camps, and evidence has begun to support the notion that children can play a key role in community transmission.

Contact tracing is the next big hurdle in the push to re-open cities

If we are indeed in the midst of a war against an invisible enemy, a contact-tracing offensive — launched by both an army of human tracers and an arsenal of technological tools — will be a big part of the key to winning. In the U.S., the most likely scenario for widespread, tech-enabled contact tracing lies with work done by Google and Apple.