You can treat flu (influenza) with osetalmivir. People with mild symptoms can still be at risk, further testing is needed [1]
Please just phone your emergency line if you suspect you may have it.
If you are already infected, a vaccine is not useful.
But regardless, there is no approved treatment for COVID.
Gilead's new antiviral looks promising, and the Chloroquine/Azithromycin combo looks promising, too, but the first isn't approved for any use yet, and the second is an uncertain off-label use, so in either case, you aren't going to get those treatments unless the alternative is likely death, if you can get them them at all.