At least a meter away, but at best, don't go out; better to keep it to yourself than let it spread out; assess your situation; beware of others, too; better to keep safe than let others harm you; don't go beyond boundaries; don't take a stroll; don't let the outside world take your self-control; talk to a minimum, or don't talk at all; cover your face with a mask; remediate with alcohol.
These will keep you apart from everyone around, keeping them safe from tragedies in which you are bound.
Then I heard the news of the Corona Virus. I guess this is also appropriate to apply.