Being a nurse was already hard. But in the pandemic, it’s become almost impossible. Credit...Adria Malcolm for The New York Times By Theresa Brown Ms. Brown is a nurse and the author of “The Shift: One Nurse, Twelve Hours, Four Patients’ Lives.” Feb. 25, 2021 When the Covid-19 pandemic hit New York this spring, Jessica Fink wanted to help. She’s been a nurse for 15 years, and she moved from Delaware to serve at Stony Brook University Hospital on Long Island. Ms. Fink told me she was “ready to contribute,” to care for Covid patients. But once she got to Stony Brook, where she worked in the I.C.U., she “felt very alone.”