The Johnson & Johnson vaccine, which has been put on hold while officials study reports of very rare but dangerous blood clots, can be stored in temperatures just above freezing. “People have been looking to create an oral vaccine for a long time without a whole lot of success,” Schaffner said. The near eradication of polio throughout the world is credited largely to the convenience of an oral vaccine. The Pfizer and Moderna vaccines need to be stored at minus 94-degrees Fahrenheit, and the Johnson & Johnson vaccine needs to be stored at 36 to 46 degrees Fahrenheit. Essentially freeze-dried, a vaccine in this form is more stable than a liquid vaccine, and its storage requirements are comparable to the Johnson & Johnson vaccine.

Source: Los Angeles Times April 16, 2021 18:22 UTC