As countries plan to roll out COVID-19 vaccines in the coming days, weeks and months, health workers and other at-risk populations should be prioritized for vaccination, the head of the World Health Organization (WHO) said on Monday. As countries plan to roll out COVID-19 vaccines in the coming days, weeks and months, health workers and other at-risk populations should be prioritized for vaccination, the head of the World Health Organization (WHO) said on Monday. Read MoreUN News – Health