Oil prices fell for the second straight day on Wednesday as doubts re-emerged over demand, with COVID-19 cases continuing to rise worldwide and gasoline shortages in some regions. Brent crude was down $1.03 or 1.3 percent at $78.06 a barrel by 0130 GMT, having fallen nearly $2 on Tuesday after touching $80.75, its highest in nearly three years. U.S. oil fell $1.02 or 1.4 percent to $74.27 a barrel, having dropped 0.2 percent in the previous session.