City officials are urging residents, especially those considered to be at high risk, to get vaccinated for the flu this season."You never know how vulnerable you're going to be," said Marena Works, director of Carson City Health and Human Services. "The flu vaccine is going to be your best protection."According to a recent report from the Centers for Disease Control, the flu season has started to peak nearly five weeks early this year, with 20 child deaths already reported.Although specific numbers are not yet available for Carson City, Works said, it seems to be mimicking the national trend."We know it's …