ORANGE COUNTY, Fla. – On the brink of two possible highly effective coronavirus vaccines, the Centers for Disease Control and Prevention is doubling down on encouraging everyone to wear face masks, saying that there is new evidence showing that not only do they prevent the wearer from spreading the virus but from contracting it as well.[TRENDING: Baby Yoda heads to space station | Highlights from SpaceX, NASA launch | Why did the giant rattlesnake cross the road?]Meanwhile,Moderna said Monday its COVID-19 vaccine is proving to be highly effective in a major trial, a second dash of hope in the global race for a shot to tame a resurgent virus that is now killing more than 8,000 people a day worldwide.The company said its vaccine appears to be.