Immigration attorneys have sported swim goggles and masks borrowed from friends to meet with clients in detention centers. Masked judges are stocking their cramped courtrooms with hand sanitizer for hearings they want to do by phone.

While much of daily life has ground to a halt to reduce the spread of the coronavirus, the Trump administration is resisting calls from immigration judges and attorneys to stop in-person hearings and shutter all immigration courts. They say the most pressing hearings can be done by phone so immigrants aren’t stuck in detention indefinitely.

Rules change daily as the virus spreads and federal officials struggle to figure out how and whether they can keep the massive system running. Officials say they have not ruled out a total shutdown but are closing specific courts and delaying hearings.

The U.S. Justice Department on Monday postponed hearings for asylum-seekers waiting in Mexico, but only after judges in San Diego canceled hearings in defiance of orders to keep them running amid the pandemic. The government has delayed hearings for immigrants who aren’t in detention but is moving forward for those who are.

Suspected coronavirus infections have forced immigration courts in New York, New Jersey and Colorado to temporarily shut down in the past week. As a precaution, the government announced the closure of several more Wednesday. Others that previously closed had reopened Thursday, including in Seattle. A handful of courts are only accepting documents.