Health authorities have said Denmark will offer Covid-19 vaccines for children aged 12-15 after the adult population has been inoculated to boost its overall immunity against the virus ahead of the winter, Reuters reports.

Initially, Denmark will only offer Pfizer-BioNTech's Covid-19 vaccine for 12-15 year-olds, as it is the only vaccine approved by the EU's drug regulator for use in adolescents, the Danish Health Authority said in a statement.

The EU regulator expects to announce a decision on the use of Moderna's shot in adolescents sometime next month.

"An expansion of the target group to the 12-15-year-olds is necessary to ensure even greater immunity in the population, and thus ensure control of the epidemic in Denmark," said the head of the Danish Health Authority, Soren Brostrom.