28
Nov
A South African laboratory study using a Covid-19 sample from an immunosuppressed person for six months found that the virus had become more pathogenic, indicating that a new variant could be a reason for illness than the current predominant omicron strain. The study, conducted by the same laboratory that first tested the Omicron strain against the vaccine last year, used samples from a person infected with HIV. Over six months the virus initially caused similar levels of cell fusion and death as the Omicron BA.1 strain, but as it evolved these levels became similar to the first version of Covid-19…