Home » Health News » Unprecedented vaccine trials on track to begin delivering results Unprecedented vaccine trials on track to begin delivering results October 22, 2020 WashingtonPost Off Health News 0000000000000 View original article Contributor: Carolyn Y. Johnson Post navigation Previous: CDC expands definition of who is a ‘close contact’ of an individual with covid-19 Next: CDC expands definition of who is a ‘close contact’ of an individual with covid-19 About The Author WashingtonPost