Nurses at Alta Bates Summit Medical Center in Oakland, Calif., were on edge as early as March, when patients with COVID-19 began to show up in areas of the hospital that were not set aside to care for them. The CDC had advised hospitals to isolate COVID-19 patients to limit staff's exposure and help conserve high-level personal protective equipment that's been in short supply. Yet COVID-19 patients continued to be scattered through the Oakland hospital, according to complaints to California's Division of OSHA. The concerns included the sixth-floor medical unit where veteran nurse Janine Paiste-Ponder worked.