"The World Health Organization is urging even people who have received a coronavirus vaccine to quarantine when they travel because there is not yet evidence that vaccines prevent people from transmitting the virus. WHO's chief scientist, Dr. Soumya Swaminathan, noted on Monday that the agency had not established whether the COVID-19 vaccines being administered across the US and in Europe prevented people from getting the virus and passing it to others. "At the moment I don't believe we have the evidence of any of the vaccines to be confident that it's going to prevent people from actually getting the infection and therefore being able to pass it on," Swaminathan told a virtual briefing, in comments reported by Axios." https://www.businessinsider.com/who-says-no-evidence-coronavirus-vaccine-prevent-transmissions-2020-12?fbclid=IwAR2scUoSz0az6gpw-fem6JWHjq3d08f04nYBxitur_Kol_ibGTJtZH9w8VE&r=US&IR=T