Regeneron stops enrolling critically ill COVID-19 patients for antibody drug trial | TheHill The Hill'COVID toes' may persist for months in long-haulers, study finds Yahoo LifestyleCovid-19 antibodies diminish over time, but experts say there's no reason to be alarmed NBC NewsStudy finds 20 percent of grocery workers had COVID-19, most without symptoms New York Post Study: Vitamin D Deficiency Common in COVID-19 Patients Pharmacy TimesView Full Coverage on Google News