LONDON (Reuters) - Oil prices fell on Thursday on concerns over the potential economic impact of the coronavirus that continues to spread worldwide, while the market also considered the possibility of an early OPEC meeting. Brent crude was down 90 cents, or 1.50%, at $58.91 a barrel by 1447 GMT, having risen 0.5% on Wednesday. U.S. crude was down 71 cents, or 1.33%, at $52.62 after dropping 0.3% in the previous session. Infection from China's coronavirus spread to more than 8,100 people..