Aston Villa Football Club CEO Christian Purslow speaks to members of the media as their home ground, Villa Park football stadium, opened as a temporary Covid-19 vaccination hub, in Birmingham, central England on February 4, 2021. - Oxford University announced on Thursday it will launch a medical trial alternating doses of Covid-19 vaccines created by different manufacturers, the first study of its kind. (Photo by Jacob King / POOL / AFP) (Photo by JACOB KING/POOL/AFP via Getty Images)
