Early reports that Omicron causes less-severe disease than Delta seem to be borne out, but it’s not yet clear to what extent that’s due to the variant itself versus the populations it’s infecting.
Regulatory T cells in the colon travel to muscles to promote wound healing in mice, raising questions about how antibiotics may impact injury recovery.
First, the genetically engineered cells became CD8+ killer T cells that wiped out his leukemia. Then they transformed into a stable population of CD4+ helper T cells that continue to circulate in his body.