A COVID-19 vaccine different from those made by Moderna, Johnson & Johnson, and Pfizer could be available to Americans "as soon as this summer," NPR reported on Sunday.
The three vaccines currently authorized for use in the U.S. work by instructing the body to manufacture something that looks like a piece of the virus, but isn't. Then, if ever infected with the real virus, the immune system is prepared. The new protein subunit vaccine, however, already contains that all-important bit, known as the spike protein, meaning the body doesn't have to produce it on its own. What's more, the protein subunit vaccine doesn't require "special refrigeration," and also contains an "adjuvant" that makes the shot "even more protective," per NPR.
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