The two COVID-19 vaccines built on the new messenger RNA technology are highly effective in preventing infections of the CCP virus, which causes COVID-19, according to a newly released real-world study. Vaccines from Pfizer/BioNTech and Moderna reduced the risk of infection by 90 percent two or more weeks after the second vaccination, according to the study. Both vaccines require two doses spaced several weeks apart. But even one dose of either decreased the risk of infection by 80 percent two or more weeks later, researchers said. “This study shows that our national vaccination efforts are working. The authorized mRNA COVID-19 vaccines provided early, substantial real-world protection against infection for our nation’s health care personnel, first responders, and other frontline essential workers,” Dr. Rochelle Walensky, director of the Centers for Disease Control and Prevention (CDC), said in a statement. “These findings should offer hope to the millions of Americans receiving COVID-19 vaccines each …