On December 8 it began with a massive headache, mild fever, then coughing, then congestion in sinus, then in lungs. All in slow motion, it took all of four weeks to become symptom free. Vaccinated with Phizer in March. My supplement regime: 10K IU D3, K2, magnesium, B complex (I was limiting animal protein), boron, quercetin, zinc, C. 70 YO.
You probably got the D. I have a light headache mostly do=use to Canadian Mist,