TOKYO : Oil prices were little changed on Tuesday, trapped in the narrow trading band of the past three weeks as investors gauged hopes for a recovery in oil demand against fears of new lockdowns due to a growing number of coronavirus cases.Prices were offered some support by positive news on the development of vaccines as drugmakers and medical institutions rush to find a way to counter the world's worst health crisis in a century.Brent futures were up 15 cents, or 0.4%, at $43.43 by 0117 GMT, while West Texas Intermediate (WTI) edged up 2 cents to $40.83.The closing prices of both Brent and WTI have traded within a $2 channel so far this month.In China, some cinemas reopened on Monday after a six-month closure, raising hope a recovery.