evidence: Importantly, many vaccines can still reduce the spread of a disease even if they don’t stop infection, contrary to Baker’s other claim that vaccines, including COVID-19 vaccines, "don’t prevent transmission." [...] Until more is known, it’s important that people who receive a COVID-19 vaccine don’t assume they can’t pass the virus on to others — and continue to wear masks and physically distance — but it’s also premature for Baker to declare the vaccines to be useless in preventing the spread of SARS-CoV-2. [...] McDonald, Jessica. "Q&A on COVID-19 Vaccines." FactCheck.org. 18 Dec 2020, updated 7 Jan 2021.