In hepatitis B virus (HBV) infection, the capacity to mount a functional virus-specific T-cell response has long been considered the principal, if not the sole, immunological determinant of viral ...

However, details of the intervening steps, as researchers have learned in the past 65 years, are quite complex — certain cells carry the flu antigen to the immune system, specific immune cells respond ...

Researchers have used an experimental mRNA therapy to make old immune cells in mice behave as if they were young again, ...