http://www.sciencemag.org/news/2021/01/one-dose-covid-19-vaccine-offers-solid-protection-against-severe-disease > Vials are prepped to receive doses of the Johnson & Johnson COVID-19 vaccine, which the company says has strong efficacy against the disease. > Science's COVID-19 reporting is supported by the Pulitzer Center and the Heising-Simons Foundation.