http://www.sciencemag.org/news/2020/11/fact-check-no-evidence-supports-trump-s-claim-covid-19-vaccine-result-was-suppressed

Unsupported political accusations have tainted the apparent good news about the development of an effective COVID-19 vaccine by two companies.

Science’s COVID-19 reporting is supported by the Pulitzer Center and the Heising-Simons Foundation.