GERMAN Health Minister Jens Spahn says Russia's COVID-19 vaccine had not been sufficiently tested, adding the aim was to have a safe product rather than just being first to start vaccinating people. President Vladimir Putin announced on Tuesday that Russia had become the first country to grant regulatory approval to a COVID-19 vaccine after less than two months of human testing. Moscow's decision to grant approval before final trials have been completed has raised concerns among some experts. "It can be dangerous to start vaccinating millions, if not billions, of people too early because it could pretty much kill the…