Nov issue of #Science #Immunology out now! This week: exTH17 cells sustain #IL17 –independent rheumatoid #arthritis; CXCR4+ mesodermal progenitors → rostral blood vessels, prodefinitive hematopoiesis, & postnatal tissue #macrophages; & how #Bcells acquire antigens from #parasites! scim.ag/4qQA6Q6