I had covid one time, back in the Fall of 2020, and my sinuses where absolutely fucked beyond belief, never had such sinus pains… and then I had absolutely no smell or taste for one and a half years afterwards. I was extremely worried I was going to live life without, but fortunately I did regain those senses. Now every couple months I will get dry coughs that will have me on the verge of throwing up from coughing so hard, it’ll last like a day, and then I’m fine until the next time and I’m not sure what causes it.