A clinical trial in which two test drugs failed to help patients with mild COVID-19 nevertheless had a silver lining: It proved the viability of a study model in which a medication's potential arrhythmic side effects are safely, effectively monitored without the participants ever setting foot in a hospital or clinic.
How effective are COVID-19 vaccines against Omicron? Researchers and Pfizer discuss the new variant, the importance of getting vaccinated, and booster shots.