LRC note. Cragg's post says the following.
Unfortunately, due to illness, I am going to have to withdraw from the US Olympic Marathon Trials. The Trials are the reason I have shown up every day for the last four years, so this has been an extremely difficult decision. Thank you to Nike, my support team, my teammates, my marathon training buddy and everyone who helped me get this close and continue to help me get back to my best.
I wish all my friends, teammates and competitors good luck in Atlanta.
LRC now has more info the withdrawal. A source close to Cragg said her withdrawal is the result of adrenal fatigue as a result of the Epstein-Barr virus.
https://www.letsrun.com/news/2020/02/defending-champion-amy-cragg-withdraws-from-2020-us-olympic-marathon-trials/