[San Pablo, California; November 5. Image via Getty] SAN PABLO, CA - NOVEMBER 05: Three year-old Hannah Rood receives an H1N1 vaccination during a drive thru H1N1 vaccination clinic at Doctor's Medical Center November 5, 2009 in San Pablo, California. Hundreds of people lined up for hours to receive a free H1N1 vaccine as California public health officials say that shortages of the H1N1…