A nurse prepares to administer Pfizer-BioNTech Covid-19 vaccine at a hospital in Krakow, southern Poland.
A nurse prepares to administer Pfizer-BioNTech Covid-19 vaccine at a hospital in Krakow, southern Poland.
Pfizer and BioNTech vow to limit vaccine delays after Europe backlash
Six nations called the situation 'unacceptable' and urged the EU to take action
