I do not know, but here in Germany all testing centres (and almost all other things except supermarkts, pharmacies and restaurants) are already closed.
I think for first time until 20 April, later they (government) may extend the time again or may not, depends on corona situation.
The idea behind it that there is a luck in medicine which cant care for very much people at the same time, so they want to slow growth, so that every patient earlier or later has chance to become needed medical treatment
I called Pearson and they cancelled my exam, now I have my voucher again valid and can shedule new exam when this pandemic ends.
This decision about close all test centres is not from Pearson but from government. So maybe in other countries it is still possible to take exam
Important test delivery information pertaining to COVID-19 (coronavirus)
Starting Tuesday, March 17, we are suspending test delivery at all U.S.- and Canada-based Pearson VUE-owned test centers for 30 days until April 16.