Updated On: 01 January, 2021 12:00 AM IST | Geneva | IANS
While many countries rely on their own regulatory systems for vaccine approvals, some countries with weak system depend on WHO's nod to a great extent for rolling out their national vaccination programmes.

Photo used for representational purpose
The World Health Organization (WHO) has granted emergency use validation for the Pfizer-BioNTech Covid-19 vaccine, opening the door for countries to expedite their own regulatory approval processes to import and administer the vaccine.
While many countries rely on their own regulatory systems for vaccine approvals, some countries with weak system depend on WHO's nod to a great extent for rolling out their national vaccination programmes.