Working at a bigger airfield (ends in KK) my precautions are lots of handwashing, lots of gel )make sure its over 60% C6 H12 OH)and Vicks First Defence three times per day. Avoid walking too close to anybody on the concourse and use gel after every (mostly in advertent but caused by muscle memory) touch of a handrail, escalator handrail or banister rail, lift pushbutton or door handle.
If I get to use an aeroplane (unlikely in this weather) I might just use my own headset and plenty of gel after touching the controls.