Yes, there are no vaccines for coronaviruses. I think there is a very low chance that we will discover one for Covid-19.

Human are no light bulbs.... but we are made of Light....

Indeed, you are no scientist.
Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium. All 11 are necessary for life. The remaining elements are trace elements, of which more than a dozen are thought on the basis of good evidence to be necessary for life. All of the mass of the trace elements put together (less than 10 grams for a human body) do not add up to the body mass of magnesium, the least common of the 11 non-trace elements.

Bio photons seem to be a chemical byproduct of oxidation events in cells. Excited oxygen isotopes returning to a lower energy state will release a photon. This hardly means we are made of light. It shows only that a small subset of energetic processes in life that uses oxygen will release a photon on occasion.

We are NOT made of light.