Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. 5 Things to Know About Pfizer's Coronavirus Vaccine Steve Baragona The news that a vaccine against the coronavirus may be on the horizon is raising hopes that the end of the COVID-19 pandemic may be in sight. [1]Pfizer and partner BioNTech announced Monday that its vaccine was more than 90% effective in an early look at its clinical trial data. The news is cause for optimism, but experts say don't throw away your mask just yet. Promising, but preliminary Experts caution that outside scientists have not reviewed the data. Even if it holds up, the vaccine may not perform as well in the real world as it seems to have in a controlled clinical trial. But overall, they say the results are very encouraging. National Institute of Allergy and Infectious Disease Director Anthony Fauci said the finding that the vaccine is more than 90% effective is "just extraordinary." "Not very many people expected it would be as high as that," he added. Questions remain Pfizer has not yet released safety data. The company says that will come in late November, two months after most patients have received their second dose. References 1. https://www.pfizer.com/news/press-release/press-release-detail/pfizer-and-biontech-announce-vaccine-candidate-against .