An employee was working in a COVID-19 unit, and accordingly was wearing full PPE during her shifts on April 25 and April 26, 2020, including an N95 mask. She felt itching on her forehead and around the mask on April 25, then developed swollen eyelids and hives to the face, trunk, and legs on April 26. She became short of breath at home on April 28 and was hospitalized, suffering from diffuse urticaria and dyspnea, possibly from the mask.