A UK study found that a single dose of vaccine cut household transmission by up to 50%: https://www.gov.uk/government/news/one-dose-of-covid-19-vaccine-can-cut

A UK study found that a single dose of vaccine cut household transmission by up to 50%: https://www.gov.uk/government/news/one-dose-of-covid-19-vaccine-can-cut-household-transmission-by-up-to-half https://www.gov.uk/government/news/one-dose-of-covid-19-vacc...