Updated October 29, 2021 at 6:02 PM ET
For Marge Loennig, 87, the COVID-19 pandemic has stirred up many old memories. The most vivid is of a childhood friend who was stricken with polio.
Loennig remembers reading to her while she lay in an iron lung ventilator.
"Her arms and her lower body were all in the lung," she recalls. "It was very frightening for her and very frightening for us."