![]() This is particularly damaging whenever the virus invades the lungs, making the simple act of breathing difficult.Īn mRNA vaccine contains a synthetic version of the RNA that a virus uses to form proteins. For example, the mRNA in the novel coronavirus behind Covid-19 enables a “spike protein” that pierces cells throughout the body. They lack the cellular machinery to replicate themselves, so they invade healthy cells and propagate within them, sometimes causing sickness or death. Viruses use RNA for a much more devilish purpose. Inside the human body, messenger RNA supplies the information that DNA uses to make proteins, which regulate our cells and tissues. If successful, both Moderna and Pfizer’s/bioNTech’s creations would be the first-ever commercially available mRNA vaccines for any virus. The sprint for a vaccine brings a new technique to the fore: using messenger RNA (mRNA). This timetable is breathtakingly fast, as new vaccine development typically requires several years, but it demonstrated the urgency with which scientists around the world are trying to slow down Covid-19. ![]() government spurred the race to develop a vaccine when it agreed to pay $4 billion to six pharmaceutical companies in return for the promise of delivering 100 million doses of a new vaccine against the novel coronavirus by early 2021. Still, the results are a sign of hope-the companies may seek permission for emergency use in the United States within weeks-though experts caution the vaccines will not likely be widely available for several months.īack in July, the U.S. The results from both companies, which exceeded expectations, came from large, continuing studies and were not published in peer-reviewed journals. The news came a week after Pfizer and and bioNTech announced their coronavirus vaccine was more than 90 percent effective. Editor's note, November 16, 2020: This story has been updated to reflect the latest news on vaccine development for Covid-19.Įarlier today, the drug maker Moderna announced the coronavirus vaccine it created was 94.5 percent effective in a major trial.
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