Any Unknown or Unlisted Aircraft Manufacturer
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 17
Workload; Distraction
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Provided Assistance
Procedure; Staffing; Human Factors; Environment - Non Weather Related
During COVID-19 operations; I was very busy with sectors combined and a lot of aircraft in the ZZZ area with a large map range.  I just took the sectors over from the previous Controller and asked him to sit on my D Side to help me.  Aircraft X was a departure [out] of ZZZ1 and was level at 15;000 north out of ZZZ Approach airspace and Aircraft Y was a departure out of ZZZ to the west of Aircraft X climbing to 10;000. I originally climbed Aircraft Y to 14;000 under Aircraft X and I was very busy with sectors combined and a lot of aircraft in the ZZZ area with a large map range.  I observed that Aircraft Y was out in front of Aircraft X and climbed Aircraft Y with a turn on course to ZZZ2 to 17;000 due to other crossing traffic from the west. Aircraft Y was faster and wouldn't be an issue to climb. I continued to work the sector and noticed that the turn to ZZZ2 was [going to] bring the Aircraft together. I turned Aircraft X to zzz2 to help parallel the Aircraft and requested to Aircraft Y to report leaving 16;000 for standard separation. I believe I had 5 miles and 1;000 feet at the closest point.Smaller scale map would have helped viewing the traffic.
Center Controller reported that while working through COVID-19 Operations; they became very busy working combined sectors resulting in an airborne conflict.