This week on Matter of Fact, Soledad O’Brien speaks with immunologist Dr. James E. K. Hildreth, president and CEO of Meharry, about why we may need to adjust our expectations if we’re hoping to see a COVID vaccine by the end of the year. Then, some 130,000 Puerto Ricans have moved to the mainland following Hurricane Maria’s destruction. Special contributor Joie Chen shows us why some believe these American voters could help turn Florida blue in November. Plus, Native American women are speaking out as they say their daughters are disappearing without a trace.