According to the organization's director for Europe, Hans Kluge, the first measure should be to sensitize the population to the importance of receiving the vaccine.
Austria was the first country in Western Europe to resume a lockdown, which is expected to last 20 days, and has said it will make vaccination mandatory from February.
The South African government denounced the measures by several countries as "unfair and potentially harmful to its economy", arguing punishment for the scientific ability to identify variants of the new coronavirus.
Countries in Europe rush to try to contain the advance of the new variant of the coronavirus, called Ômicron; United States issued flight alert.
Passengers on a flight originating in South Africa were tested and isolated after arriving in Europe; German government claims that the variant is already present in the country.