Everybody has. There is Chinese New Year, always surprising companies exporting from China every year like Christmas, and than at the same time Corona. Now there is a huge backlog of produced goods in Chinese ports, a huge order backlog at Chinese manufacturers amyd not enough shipping and production capacity. Ultimately things will revert to normal, so. That Corona is now hitting the destinations of these backlogs doesn't help, obviously.

My thought is that cargo capacity is down a lot without passenger jets flying around.

And cargo operations staff may be reluctant to fly to China.

Staff wouldn’t be permitted to stay on the aircraft until takeoff. And would likely violate hours of service anyway.