UK here. You are the first person to mention vertigo. I have had the worst virus I have ever experienced and am still suffering. Started with a sore throat, then hacking cough, sneezing fits and shooting pains in the head. Next level was pain in sinus, teeth, ears and feeling sick, and now I have just got over severe dehydration, and room spinning around me violently. Never felt this ill. It just seemed to keep morphing. Started New Year's Eve. Now I feel totally without energy and still feel sick.