A lab technician sorts blood samples for COVID-19 vaccination study at the Research Centers of America in Hollywood, Florida on August 13, 2020. (Photo by CHANDAN KHANNA / AFP) (Photo by CHANDAN KHANNA/AFP via Getty Images)

In light of announcements from multiple pharmaceutical companies about better-than-expected results in Covid-19 vaccine trials, the co-director of the Center for Vaccine Development has urged the public not to hold out for a particular company’s product. The co-director says the vaccines act in similar ways, so people should use whatever vaccine is available – so long as it has been approved by the U.S. Food and Drug Administration.