Science’s COVID-19 reporting is supported by the Pulitzer Center and the Heising-Simons Foundation.
In June, Ravindra Gupta, a virologist at the University of Cambridge, heard about a cancer patient who had come into a local hospital the month before with COVID-19 and was still shedding virus. The patient was being treated for a lymphoma that had relapsed and had been given rituximab, a drug that depletes antibody-producing B cells. That made it hard for him to shake the infection with SARS-CoV-2.
Gupta, who studies how resistance to HIV drugs arises, became interested in the case and helped treat the patient, who died in August, 101 days after his COVID-19 diagnosis, despite being given the antiviral drug remdesivir and two rounds of plasma from recovered patients, which contained antibodies against the virus. When Gupta studied genome sequences from the coronavirus that infected the patient, he discovered that SARS-CoV-2 had acquired several mutations that might have allowed it to elude the antibodies.