Oil prices slipped on Friday in the midst of developing vulnerability about the worldwide recuperation in fuel demand as coronavirus cases flooded in a few nations. Brent crude slipped 26 cents to $43.11 a barrel. U.S. WTI dropped 23 cents to $40.52. The two benchmark crudes fell 1% on Thursday after the OPEC and its allies agreed to trim their record supply cuts by 2 million bpd, starting in August.