Drugmakers Resume COVID-19 Vaccine Trials

Johnson & Johnson and AstraZeneca have resumed their vaccine trials in the US after pauses due to participants falling ill. Both companies have agreements with the US government to supply vaccines once approved.

What event caused Johnson and Johnson to pause their trials last week?

What happened to a study participant in Johnson and Johnson's trial?

What action did Astra Zeneca take regarding their US trials?

What was the reason for Astra Zeneca's trials being paused in early September?

What do both Johnson and Johnson and Astra Zeneca have contracts with the US for?