First off, go to sleep, get some fuckin rest. They have basically made it a crime to tell people how to boost their immune system to ward off this shit, hoping everyone will instead get a jab in the arm.
Go get this stuff-
It's the best shit you can get. Better than Tamiflu. It aids your body in fighting off the virus, not mask the symptoms. 2 years ago the plague went around here, never been so sick in my life. Did not sit up for 5 days, lost 20 lbs. Pulled muscles coughing. But I took this stuff and rested for a week. A lot of others didn't and were sick for MONTHS, I kid you not.
Lastly, get on some vitamin D3 NOW. Take about 5,000 IU a day. Drink some Echinacea tea and a lot of water to flush yourself. - you can get a gigantic bottle of D3 2,000IU pills at Costco for like $20. Take 3 a day.
One more alternative is Oil of Oregano. (70% Carvacol or higher). Everyone should be taking a couple drops twice a day under your tongue.
You're welcome.