California can responsibly navigate the risks of reopening

As California counties start to loosen their stay-at-home policies and go through the phases of re-opening, they should look at the experience of Northern European countries that have been significantly and successfully relaxing restrictions over the last several weeks.
These countries have been able to reopen schools and retail businesses without triggering unmanageable spikes in COVID-19 hospitalizations.
Denmark offers the most striking example.  After implementing an early and stri