Further reading/resources:

• Trump repeats inaccurate claim about masks, citing CDC study. (NBC News)
• CDC study referenced in today's episode
• Low zinc levels at clinical admission associates with poor outcomes in COVID-19 (MedRxiv)
• COVID-19: Poor outcomes in patients with zinc deficiency (ScienceDirect)
• Zinc: Fact Sheet for Health Professionals (National Institutes of Health)
• Low plasma 25(OH) vitamin D level is associated with increased risk of COVID‐19 infection: an Israeli population‐based study (The FEBS Journal)
• The link between vitamin D deficiency and Covid-19 in a large population (MedRxiv)