6 Min Read (In Jan 10 story, corrects paragraph 16 to say Pfizer and BioNTech halved 2020 output forecast in November, not December) * Germany starts by sending vaccination teams to care homes * Many vaccination centres stand idle * Lack of supply, burdensome paperwork slow mobile teams * Health minister targets 300,000 shots per day * As in U.S., Spain, performance varies between states BERLIN/DILLENBURG, Germany, Jan 10 (Reuters) - Proud of their national reputation for efficiency, Germans are growing increasingly frustrated by the slow rollout of a COVID-19 vaccine its scientists helped develop. Scarce vaccine supply, cumbersome paperwork, a lack of healthcare staff and an aged and immobile population are hampering efforts to get early doses of a vaccine made by U.S.-based Pfizer and German partner BioNTech into the arms of the people.