Last week, parts of Europe suspended the use of AstraZeneca’s COVID-19 vaccine after a few vaccinated individuals reported dangerous blood clots. Johns Hopkins vaccine safety expert Dan Salmon talks with Stephanie Desmon about the situation and why it’s reassuring in terms of vaccine safety monitoring, and how these are questions that “can and will be answered by science.” Note: This conversation was recorded on March 17. Since then, the European Medicines Agency has concluded that the vaccine’s benefits outweigh the risks.