USMLE committee has announced that it is allowing that those candidates that are concerned about their ability to test safely, to reschedule USMLE test appointments without paying the additional fees.
If the current threat level continues, the eligibility period that end on July 31, will be extended beyond that date (please, visit the USMLE site for details)
USMLE recommends to monitor the website for updated information.
And of course, if you have flu-like symptoms, or you may have been recently exposed to a Flu patient, you should reschedule your exam.
Read the complete information here.