DURHAM, N.C. – Duke scientists have identified a previously unknown barrier that separates the bloodstream from smelling cells in the upper airway of mice, likely as a way to protect the brain. But
storyteller became the story. i have cancer. reporter: boyd was diagnosed with multiple myeloma, a cancer of the plasma cells in his blood. it s a punch in the gut. reporter: doctors immediately blasted his body with chemo while viewers flooded his home with get well wishes by his side, his wife, sherry, together since they were 17 we do just try to take it a day at a time. reporter: and no day was more important than april 15th when boyd got his life-saving bone marrow transplants. yeah, it s the beginning of the next phase of my life it s my reboot reporter: a reboot that includes his first grandchild, tess boyd first held her right before the transplant and keeps this card hanging on his fridge. i don t think we ll ever take that down because it s a reminder of where we were at that time. but it s also a reminder of how blessed we are going
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) exhibits variable immunity responses among hosts based on symptom severity. Whether immunity in recovered individuals is effective for avoiding reinfection is poorly understood. Determination of immune memory status against SARS-CoV-2 helps identify reinfection risk and vaccine efficacy. Hence, after recovery from COVID-19, evaluation of protective effectiveness and durable immunity of prior disease could be significant. Recent reports described the dynamics of SARS-CoV-2 -specific humoral and cellular responses for more than six months in convalescent SARS-CoV-2 individuals. Given the current evidence, NK cell subpopulations, especially the memory-like NK cell subset, indicate a significant role in determining COVID-19 severity. Still, the information on the long-term NK cell immunity conferred by SARS-CoV-2 infection is scant. The evidence from vaccine clinical trials and observational studies indicates that hybrid natural/