From the article:
Prashant Yadav, a health care supply chain expert at the Center for Global Development in Washington, said the disappointing results challenge the assumption that all mRNA vaccines are alike.
“We’ve had this question mark since very start of research on mRNA vaccines,” he said. It’s possible, Dr. Yadav said, that CureVac’s design may be partly to blame for the low efficacy, not just the variants.
Although many vaccine experts had seen promise for CureVac’s shots in much of the unvaccinated world, the new results cloud their outlook.