Weeks after Merck & Co. scrapped development of its Covid-19 vaccines in January, one of its senior manufacturing officials began phoning his deputies, telling them their work on a pandemic shot wasn’t actually over. J&J’s unusual collaboration with a rival, and Merck’s speedy manufacturing run-up, reflect one of the biggest challenges of the pandemic: making enough Covid-19 vaccines to meet …
On Friday, a Food and Drug Administration advisory committee authorized Johnson & Johnson's one-shot coronavirus vaccine, determining it to be safe and effective. "The bottleneck is not workers — it's actually validating the new equipment that's going in to add to these production lines, and adding production lines is not simple," Handfield explained. "People are also really concerned in this …
