German Chancellor Angela Merkel has publicly rebuked a top rival politicians comments describing people who have been vaccinated against Covid-19 as "guinea pigs", AP reports.

The long-serving leader said in a speech before parliament that "none of us was and is any way a guinea pig when it comes to vaccination".

Vice Chancellor Olaf Scholz, whose centre-left Social Democrats Party currently leads polls ahead of Germany's Sept 26 elections, recently said that fully vaccinated people have been the "guinea pigs" for those who so far have held off. He added that he was vaccinated and others should follow.

The chancellor said that "neither Olaf Scholz nor me and no one else was a guinea pig in taking the fully tested and approved vaccines in Germany".