Interesting read:
Testing is meticulous in China as conditional to re-opening their centralized communist economy.

Free market economies lack cohesive action plans with 2020 recoveries less likely. Political fault-lines will shift and global stresses sharply increase. https://twitter.com/sharonchenhm/status/1248785969072881666

Important thread on Bayes rule, mathematical probability and why testing positive for #covid19 antibody doesn't mean you're immune from getting sick (again) or spreading it to others. https://twitter.com/taaltree/status/1248467731545911296