Friday assorted links by Tyler Cowen September 25, 2020 at 12:23 pm 1. Human Challenge Trials. Good thread. 2. Jordan Schneider podcast with Adam Tooze. 3. Significant Fast Grants-supported research on immunology, Covid, and related matters. And Eric Topol with some context. 4. Gross markets in everything. 5. There are now three labs for testing SalivaDirect.