Ask Derrick: Vaccines and virus transmissionTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video06/16/2022June 16, 2022Do you have questions about COVID-19? DW science editor Derrick Williams will answer them with the latest research and analysis. This week he looks at how effective vaccines are in stopping the virus from being passed on.https://p.dw.com/p/4Cox5Advertisement