President Donald Trump claimed Wednesday that a Covid-19 vaccine could be ready to distribute as early as mid-October — hours after the head of the CDC testified it likely wouldn't be ready until the end of the year and Joe Biden voiced concerns that Trump was putting politics ahead of safety.

In testimony before the Senate, CDC head Robert Redfield said a vaccine would take “six to nine” months to get every American vaccinated and predicted a return to “regular life” by late next year.

Biden said Wednesday that he doesn’t trust Trump to safely oversee the federal government’s approval and distribution of a Covid-19 vaccine.