Johns Hopkins Medicine researchers have shown that it is possible for solid organ transplant recipients who contract COVID-19 to experience a natural immune response to SARS-CoV-2, the virus that causes the disease. In their study, published online Jan. 19, 2021, in the journal Transplantation, the researchers also suggest that measures used to provide short-term immunity against SARS-CoV-2—such as convalescent plasma (which contains antibodies from patients who have recovered from COVID-19)—may actually reduce the natural response.