WARSAW, Poland — Government officials say Poland will begin offering vaccines against the coronavirus to children ages 12-15 next week.

The plans described on Tuesday came after the European Union’s drug regulator recommended Friday that the use of the vaccine made by Pfizer and BioNTech be expanded to that age group.

The Polish government also said that people could start accessing COVID-19 travel certificates online starting Tuesday, a plan the EU agreed on to ease summer travel. It involves providing a certificate to EU residents who can prove they have been vaccinated, tested negative for the virus or recovered from COVID-19, allowing them to avoid quarantines.

Michal Dworczyk, who heads the government’s vaccination program, said vaccines for younger adolescents would begin on June 7. Education Minister Przemysław Czarnek said the government also plans to carry out a school vaccination programs in the fall to encourage families to get shots for older children.

He said that vaccinations for children, as for adults, would be voluntary.