Singapore has one of the lowest rates of the Corina virus. Here is a study in how it has done that, and compares it to West Africa, where rates are also low.
Here is a small excerpt from the article to give you some interesting detail:
Outside China, Singapore has the strongest contact with Wuhan, with an estimated 3.4 million people traveling between Wuhan and Singapore annually, and they had the greatest potential existential threat due to COVID-19 (WHO, 2020b). It is, however, interesting to note that the rate of coronavirus infection spread in Singapore has been one of the slowest worldwide.