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A molecular cousin of DNA, mRNA contains instructions to build specific proteins; in this case, the mRNA in the vaccine codes for the coronavirus spike protein, a structure that sticks off the virus's surface and is used to infect human cells. nikon 60mm f2 8 d af micro nikkor lens And that's kind of what we're doing on Wednesday, so it fit perfectly with that. nikon 60mm f2 8 d af micro nikkor lens Johnson & Johnson recently announced that its single-shot coronavirus vaccine was 66% effective in preventing moderate-to-severe COVID-19 in a global trial, and 57% effective in South Africa at 28 days post-vaccination. nikon 60mm f2 8 d af micro nikkor lens DePauw University professor and media critic Jeffrey McCall feels the left is hurting itself by parroting extreme comments made by attention seekers instead of echoing more thoughtful Democrats who understand the nation needs to come together. nikon 60mm f2 8 d af micro nikkor lens