28. The ABCDs Still Work ...Except for the D - Masking Everyone for COVID: Does it Work? - Masks Prevent Passage of Virus - 50% TCA for Idiopathic Guttate Hypomelanosis - Acetophenone Azide: An Emer

• The ABCDs Still Work -
• ...Except for the D -
• Masking Everyone for COVID: Does it Work? -
• Masks Prevent Passage of Virus -
• 50% TCA for Idiopathic Guttate Hypomelanosis -
• Acetophenone Azide: An Emerging Shin Allergen -
• IgG4-Related Disease

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Luke and Michelle report no conflicts of interest.