Local businesses react to news of Columbia, Boone County health orders expiring COLUMBIA, Mo. (KMIZ) Columbia Mayor Brian Treece said Monday that the city and county coronavirus health orders will expire May 12 and will not be replaced, saying now is the right time to "turn back the dial" on restrictions. Treece cited low levels of new coronavirus case levels and high rates of vaccination during a news conference Monday at Columbia City Hall. New cases are staying steady but low in Boone County. The five-day average of new daily cases has remained at about 10 for the past week. Active cases are below 100.