ray, zap, a ray of hope, promising electrical treatments (a.k.a. neurostimulation) that could offer a ray of hope.

Long COVID is a mysterious condition, but new research reveals promising electrical treatments (a.k.a. neurostimulation) that could offer a ray of hope.


SPECTRUM.IEEE.ORG
Zapping the Brain and Nerves Could Treat Long COVID
Neurostimulation refers to electrical stimulation of the brain or peripheral ne

a ray of hope

: something that holds the promise of hope. This new medicine is a ray of hope for/to thousands of people.

Ray of hope Definition & Meaning - Merriam-Webster