Push the fluids, big time. Up vit C. Hot chicken noodle soup. Toast. Hot shower so he can inhale moisture. Neosporin up nostrils w q.tip. cough drops. Distilled warm water & salt = warm saline solution as a saline nasal rinse, a mechanical method to actually rinse virus particles out of his nasal-sinus areas - decrease viral load to increase speed of recovery. Mix all together w a man and let simmer on low until he feels better. I wouldn't go too far w ivermectin... drop window blinds, warm not cold, quiet. Let patient rest. Is he having sinus involvement? He can also gargle n spit, warm salty water few times a day - again to decrease viral load.
Can u get those new pills they just came out with?
Some warm brandy for you? Put your feet up and rest, too he'll recover. If you are really worried? Theres always a phone. U can call your local hospital and speak w night nurses for advise. And u can drag him in to see a doctor, too.