S572 Comparison of Provider Fear Levels During Primary and Subsequent Intubations and Primary and Subsequent Endoscopies of COVID-19 Patients: Results From Two US National Surveys. (October 2021) - Al Shabeeb, Reem Q.; Lee, Esther; El Shatanofy, Muhammad; Pashai, Erika; Benjenk, Ivy; Sherman, Marian; Heinz, Eric; Yamane, David; Borum, Marie L.