However you can make it mandatory for anyone with cold/flu symptoms to self-isolate rather than do the manly thing of bring it into an office and work through it. You can also make it so that people have to go into quarantine after international travel. You can also do some testing.

Rabies has been kept outside of the UK for decades by the quarantine approach. Pets can go one way from the UK to the rest of the world quite freely but on the way back they have to be quarantined. With rabies free Ireland an exception can be made.

With this approach we can avoid the indefinite lockdown required until the holy vaccine is found.