Exactly what it says on the tin, having numerous disinfect tasks queued causes the game to lag and slow to a crawl.
We're talking Power Point levels of bad.
Steps to Reproduce
Have a lot of buildings with germs, or use my save and use the debug tool to have all the buildings have germs on them, then use the disinfect tool and slide it over a good chunk of the base.
This issue has not been confirmed by a developer yet.