Make it obligatory to wear a face-mask - that covers both the nose and mouth - in all public places both inside and out. People under 11 years old and those with certain health issues should be exempt. The mask can be removed for eating and drinking.
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The practice of mandatory face-mask wearing amongst populations has shown to cut down the risk of spreading Covid-19. Given the situation of high-infection the country is experiencing, wearing face-masks in this way - in addition to practicing social-distancing and frequently washing hands with soap and water - will really help with keeping the infection rates to a minimum. It helps promote a sense of solidarity - a visible sign that everyone is acting together to try to minimise infection.