Flooded bank of the Rhine river is seen in Cologne, western Germany, July 15, 2021. Photo:Xinhua

Germany plans to start offering COVID-19 booster shots to the elderly and at-risk from September 1, according to a draft document seen by AFP on Sunday, as concerns grow about the spread of the Delta variant.

The plan also recommends promoting vaccination for those aged 12-17, which would go further than earlier guidance issued by the country's vaccine regulator.

Health Minister Jens Spahn and Germany's 16 regional health ministers are expected to finalize the plans, drawn up by ministry officials, in a meeting Monday. 

Mobile vaccination teams will be sent into care and nursing homes to offer Pfizer/BioNTech or Moderna booster shots to residents, regardless of which vaccine they had originally, says the document.

Doctors will also be able to administer the booster jab to those who qualify, such as the elderly and people with weakened immune systems.

The text justifies the initiative by citing recent studies showing that protection from infection declines with time, putting vulnerable people at risk again. Although Germany is currently enjoying relatively low infection rates compared with neighboring countries, case numbers have been creeping up in recent weeks mainly because of the more contagious Delta variant.

There are also concerns about a slowdown in the country's vaccination rate, with just over 52 percent of the population fully jabbed.

In an effort to get more younger people vaccinated, health ministers want to widen access by opening all the country's vaccination centers to 12- to 17-year-old.

Schools and universities should also offer the jabs, the draft resolution says.

Germany's STIKO vaccine commission disappointed many in June when it officially recommended the vaccine only for 12-17 year olds if they had pre-existing conditions, or lived with people at high risk from COVID-19.

Although adolescents who don't fall into those categories are still allowed to get vaccinated, in consultation with their parents and doctors, the cautious STIKO guidance has slowed take-up.

Within the European Union, the European Medicines Agency has approved the Pfizer/BioNTech and Moderna shots for all over-12s.

Health Minister Spahn tweeted on Saturday that so far one in five of Germany's 12-17- year-olds had received their first coronavirus shot.

"There's enough vaccine for all age groups: anyone who wants to, can get vaccinated," he wrote.

According to the draft, getting children and teenagers vaccinated could "contribute significantly to a safe return to classrooms after the summer holidays."