Update 30 April 10.00 AM: U-OV starts different lines to keep important destinations such as hospitals accessible. For Utrecht Science Park this means that line 28 runs approximately every half an hour between Utrecht CS and P + R De Uithof. Line 28 leaves at Utrecht Central Station from the Jaarbeursplein.
Please account for extra travel time and try to travel by bicycle or car if possible. More on the strike at the website of U-OV.