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Moderna Is Testing a New Version of Its COVID-19 Vaccine That Wouldn’t Require Ultra-Cold Storage

April 29, 2021

As safety concerns over COVID-19 vaccines from AstraZeneca and Johnson&Johnson–Janssen have led to disruptions in the inoculation efforts of numerous countries relying on those shots, companies like Moderna are attempting to fill the resulting gaps.

The Massachusetts-based biotech company announced on April 29 that it is investing billions to boost manufacturing facilities in Switzerland, Spain and the U.S., building enough capacity to produce up to 3 billion doses of its mRNA-based vaccine through 2022. The company’s vaccine technology differs from that of AstraZeneca and J&J, which both use an adenovirus to deliver COVID-19 virus genes to the immune system—and which both have been have been associated with serious, life-threatening—albeit very rare—blood clots.

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