AstraZeneca, J&J resuming US tests of COVID-19 vaccines

Two drugmakers say they have the go-ahead to resuming U.S. testing of their COVID-19 vaccine candidates. Both are in the final stage of testing before the companies can seek regulatory approval. Testing of AstraZeneca’s vaccine candidate had been halted since early September. Johnson & Johnson’s study was paused at the beginning of last week. Each company had one volunteer who developed a serious health issue, requiring a review of safety data. Such temporary study halts are rela