The California trial pitting an elderly cancer victim against Monsanto owner Bayer AG has been delayed due to concerns about the spread of Covid-19, with proceedings now expected to resume next week in a virtual format via Zoom.

Lawyers for plaintiff Donnetta Stephens say that she was a regular user of Monsanto’s glyphosate-based Roundup herbicide for more than 30 years, an extended exposure that caused her to develop non-Hodgkin lymphoma (NHL).

Before the trial interruption jury members heard expert witness testimony from former U.S. government scientist Christopher Portier, who told jurors of multiple scientific studies that support claims glyphosate herbicides cause NHL. Lawyers for Monsanto sought to discredit Portier, and discount his testimony, arguing he had a vested financial interest in helping plaintiffs’ attorneys.

Additional experts were due to testify this week before in-person proceedings were scuttled due to positive cases of the Covid-19 virus showing up among people in the courtroom.

Stephens was diagnosed with NHL in 2017 and has suffered from numerous health complications amid multiple rounds of chemotherapy since then. Because of her poor health,  a judge in December granted Stephens a trial “preference,” meaning her case was expedited, after her lawyers informed the court that Stephens is “in a perpetual state of pain,” and losing cognition and memory.