COVID-19 vaccine offers lasting immunity from the virus. The vaccine is expected to provide immunity from the coronavirus for up to two years, according to health ministry.What world leaders are saying: German Health Minister Jens Spahn said the vaccine had not been sufficiently tested, adding the aim was to have a safe product rather than just being first to start vaccinating people.Israel will examine Russia's COVID-19 vaccine and enter negotiations to buy it if it is found to be a "serious product", Israel's health minister said.Philippine scientists were set to meet representatives of the Russian research facility that developed the vaccine on Wednesday, to discuss possible participation in clinical trials and access to its research.