We start with a catch-up on the latest US numbers.

California rolls back reopening and LA and SD schools announce no in-person classes.

Wal-Mart joins a growing list of retailers requiring face masks.  Are we making progress on “politicizing” face masks?

A very extensive seroprevalence study out of Spain looked at over 60,000 people. Ben is excited by this demographic catnip, including implications for infection among children and the amount of asymptomatic cases.

A recent study did autopsies on COVID-19 patients to assess the role of immune-mediated, rather than pathogenmediated, organ inflammation and injury.

We discuss the latest on potential use of human challenge trials.

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With Nate Duncan (@NateDuncanNBA) and Ben Taylor (@ElGee35).

Articles and studies cited on the showWalmart to Require Face Masks in All U.S. Stores Starting July 20Covid-19 Cases Jump in Sunbelt Nursing HomesCDC: Covid-19 death toll is twice as high among people of color under age 65 as for white AmericansCoronavirus Surge in Tulsa ‘More Than Likely’ Linked to Trump RallyA Profile of Older Americans: 2017Serial Laboratory Testing for SARS-CoV-2 Infection Among Incarcerated and Detained Persons in a Correctional and Detention Facility — Louisiana, April–May 2020 | MMWRDoctors explain why mutated strain of coronavirus that is dominant in Houston is more contagious but not more deadlyWhat To Look For In A Face Mask, According To ScienceThe implications of silent transmission for the control of COVID-19 outbreaksPrevalence of SARS-CoV-2 in Spain (ENE-COVID): a nationwide, population-based seroepidemiological studyHumoral immune response and prolonged PCR positivity in a cohort of 1343 SARS-CoV 2 patients in the New York City regionTissue-specific tolerance in fatal Covid-19FDA official casts doubt on 'challenge trials' for Covid-19 vaccine

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