Italian Prime Minister Mario Draghi said China’s anti-COVID-19 vaccine did not fully work and questioned whether Russia’s Sputnik jab would ever get approval from European regulators. “The Chinese vaccine … has shown itself not to be adequate. You can see that from Chile’s experience of tackling the epidemic,” Draghi told reporters at the end of a European Union summit. Chile has relied heavily on the COVID-19 shot developed by China’s Sinovac, but health authorities in the South American country have questioned how effective it is against more transmissible virus variants and are also looking into how long it remains effective once injected. A recent study by the University of Chile found that a single dose of Sinovac vaccine is only 3 percent effective in the 28 days between the first and second doses, meaning that the first dose has almost no effect, and people who received the first dose were …